Malicious PDF — malware analysis report

Static analysis result for SHA-256 e02d2e025376af0a…

MALICIOUS

PDF

79.8 KB Created: 2021-09-10 03:10:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 6749b8a9befaad3047e8321b2f50ce67 SHA-1: b55e8627b17cf906eff009b0434d1df9e81e04aa SHA-256: e02d2e025376af0a89d8efeb881a5dce70788a405a717c229777cae9add4d84a
156 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous links pointing to compromised or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The PDF structure and embedded links are consistent with phishing or malware distribution campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 6

  • 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.
  • 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 http://imi.vc/upload/files/4824784630.pdf In PDF document text
    • http://visualpaint.com/wp-content/plugins/formcraft/file-upload/server/content/files/161397ef6a629e---46791767056.pdfIn PDF document text
    • http://hvpeds.com/upload/contents/file/26312601549.pdfIn PDF document text
    • http://marinaxaraes.com.br/ckfinder/userfiles/files/5113512711.pdfIn PDF document text
    • https://kurashi-kyoiku.com/cms/dat/upimg/file/jetijubobapelujidavuvot.pdfIn PDF document text
    • http://jubileejec.com/userfiles/files/32382721728.pdfIn PDF document text
    • http://alajwakh.com/uploaded_files/userfiles/files/tefopigifirefov.pdfIn PDF document text
    • https://firsatoyun.com/calisma2/files/uploads/50633681230.pdfIn PDF document text
    • http://rybarict.cz/webpagebuilder/ckfinder/userfiles/files/93613166580.pdfIn PDF document text
    • http://akademia-jedenastka.pl/zdjecia/fck/file/sekikoxedapixakagaxitul.pdfIn PDF document text
    • https://aryaayur.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130dcb3e6a76---zipijosigiragupetol.pdfIn PDF document text
    • https://butchercurnow.com/img/shop/contents/91049883377.pdfIn PDF document text
    • http://planet-for-events.de/userfiles/file/44433175534.pdfIn PDF document text
    • http://athaj2.specialty-match.com/upload/files/lufimuf.pdfIn PDF document text
    • https://www.moxiclear.com.au/application/third_party/ckfinder/userfiles/files/74040726399.pdfIn PDF document text
    • http://anm-av.de/uploads/files/23581279688.pdfIn PDF document text
    • http://vecsecity.info/editor_up/92483460602.pdfIn PDF document text
    • http://steinemann-ag.ru/faruviviretefiliduluv.pdfIn PDF document text
    • https://www.allterra.group/wp-content/plugins/super-forms/uploads/php/files/685038d4f0a594682b11ab7209770ca2/88599956561.pdfIn PDF document text
    • https://illinoisfiscalpolicycouncil.org/app/webroot/userfiles/file/neluzex.pdfIn PDF document text
    • https://nomaquito-travel.com/editor-images/17817237523.pdfIn PDF document text
    • https://mrpressconsulting.com/UserFiles/file/givexokavabuba.pdfIn PDF document text
    • https://jungleflightchiangmai.jungle-flight.com/Uploads/files/bewaxefotazowira.pdfIn PDF document text
    • https://korzayithalat.com/spot/admin/fckeditor/userfiles/file/lanelamomodiwimup.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=meet+attendance+androidPDF 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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d9cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9CD 10144 bytes
SHA-256: 0e10d40a1771d80d3b29a9546665ee79fbf40428a89d2eb88146153e598a2812
font_01_sfnt_off0000f08b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF08B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001089d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1089D 16016 bytes
SHA-256: f7521db72806b2ab5f4ed2cb6f4f3c63d94e401767597686f9e5fea7c9a57bac