Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e2c61b9e2ee3328…

MALICIOUS

PDF

89.9 KB Created: 2021-07-25 10:22:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 219edfb20a4b98b1e7a7c50da97a5e96 SHA-1: d57f89d3f2bf9880b4b1739c92fcb0c490d5cc33 SHA-256: 3e2c61b9e2ee3328b834b46fb55b087a7a1366c9a599dbccc67780e38568ab5c
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file is a PDF that contains numerous links to compromised WordPress sites, suggesting it is part of a link farm designed to host malicious content. The presence of a 'download button' heuristic and ClamAV detection further supports its malicious nature. The ML classifier also flagged it with high confidence, indicating a likely phishing or malware delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9822

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://webgirls-studio.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071a12242d08---bafuzifiwero.pdf In PDF document text
    • http://www.mkkdigital.pt/wp-content/plugins/formcraft/file-upload/server/content/files/160a08694a8a09---pifejilojididizozesejiw.pdfIn PDF document text
    • https://amblamy.ee/upload/file/xarutiworowu.pdfIn PDF document text
    • https://afriqueitnews.com/wp-content/plugins/super-forms/uploads/php/files/5d8acbfb1aeb7bccad62b82e2c05f465/93247508387.pdfIn PDF document text
    • http://tara77.com/clients/46590/File/fafikumofovasuzanafosupe.pdfIn PDF document text
    • https://stagerightstaging.com/wp-content/plugins/super-forms/uploads/php/files/dd65ae7f35df8cb2935ffcd25b68d140/14638234815.pdfIn PDF document text
    • http://www.gametimecatering.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b556ed8a356---3400068706.pdfIn PDF document text
    • http://accessiblevehicleservices.com/userfiles/file/dopote.pdfIn PDF document text
    • https://www.superioreagle.com/wp-content/plugins/formcraft/file-upload/server/content/files/160925b5adcd70---vidix.pdfIn PDF document text
    • http://knshzj.com/CKEdit/upload/files/vivozisejizoxazo.pdfIn PDF document text
    • http://giasudaihocsupham.com/Images_upload/files/17396405991.pdfIn PDF document text
    • https://www.femregenx.co.za/wp-content/plugins/super-forms/uploads/php/files/gj8ianeq018kkltd7eaa1tfe1n/gamigobigonujeze.pdfIn PDF document text
    • http://olgapolyakova.com/files/files/31888185861.pdfIn PDF document text
    • https://arizonapoolcontractor.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f8d792b8ac---kukotorojowuzone.pdfIn PDF document text
    • https://www.lumisolar.pe/wp-content/plugins/formcraft/file-upload/server/content/files/1607be737085cf---vexojaxilala.pdfIn PDF document text
    • http://studiorinaldibedin.eu/userfiles/files/bolapar.pdfIn PDF document text
    • https://zweiund40.com/wp-content/plugins/super-forms/uploads/php/files/459arm5i59dv3jh8ibpg0cslme/99657055241.pdfIn PDF document text
    • http://vuadiemtayninh.com/hinhanh_fckeditor/file/japelibovosirarex.pdfIn PDF document text
    • https://syntellect.ru/Repository/file/balepifogegefibesad.pdfIn PDF document text
    • https://pensionatiitalianiinportogallo.it/wp-content/plugins/super-forms/uploads/php/files/9227c94214ccc3a279508c7c3b501194/pisubegekiwali.pdfIn PDF document text
    • http://natur-pet.cz/webpagebuilder/ckfinder/userfiles/files/velajosirefuwulorelokovaz.pdfIn PDF document text
    • https://suhrsmad.dk/wp-content/plugins/formcraft/file-upload/server/content/files/16082816d00317---30036249770.pdfIn PDF document text
    • https://www.birdandwildlifeteam.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8f8f13dfac---58496756037.pdfIn PDF document text
    • https://bacninhonline.com/webroot/img/files/13826491946.pdfIn PDF document text
    • http://lightningriskassessment.com/ci/userfiles/files/91116483977.pdfIn PDF document text
    • https://shotclock.ca/wp-content/plugins/super-forms/uploads/php/files/851b90c015c8908c17b13be15cc578b9/kesibulupamafeb.pdfIn PDF document text
    • https://senzedigicraft.com/wp-content/plugins/super-forms/uploads/php/files/f889bb0809d0a834cd8e27441aee769b/22138356089.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=beloved+full+movie+free+downloadPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fd59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD59 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011570.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11570 10556 bytes
SHA-256: 55042da8cf5f599a8228256f38333cab09b3ba1f8fb02faa916290f71af2c02e
font_02_sfnt_off00012d82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D82 17104 bytes
SHA-256: a320424d3651d08bc4ec51cff03e9a5e5c55aa12eaae9c1dc3f6f20d7b041fdc

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