Malicious PDF — malware analysis report

Static analysis result for SHA-256 a25b41d52d36672f…

MALICIOUS

PDF

91.8 KB Created: 2021-09-07 13:23:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 8f9a176e6ff4fdcb580ae910cc98f42b SHA-1: e80d31dfd1bb27d6b54757977f9ab6e49771c98f SHA-256: a25b41d52d36672fababd6fd33767f16ca5d952a904056614e89397bcad0267b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are hosted on compromised WordPress installations or disposable domains, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the PDF structure and embedded URLs point towards a social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9822

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 https://drafthe.ru/uplcv?utm_term=direito+digital+patricia+peck+pdf PDF link annotation
    • https://avayemehr-carpet.ir/data/file/8594437602.pdfIn PDF document text
    • http://maysoi.com/hinhanh_fckeditor/file/51020173873.pdfIn PDF document text
    • http://albertopizzetti.it/userfiles/files/87050423777.pdfIn PDF document text
    • http://airholic.com/UpFiles/WebEditorFiles/file/17457765760.pdfIn PDF document text
    • http://chizclean.ru/files/fck/file/nokane.pdfIn PDF document text
    • https://benchmarktransitions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160acace6134ed---voxupe.pdfIn PDF document text
    • http://mispuntossaga.com/campannas/file/60539373921.pdfIn PDF document text
    • https://islandsvefir.is/wp-content/plugins/super-forms/uploads/php/files/2r5bi7n2hnisqpkq0puol69qk1/97331168596.pdfIn PDF document text
    • http://www.tenniscanberra.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1612508e8284e0---pukag.pdfIn PDF document text
    • https://islandsvefir.is/wp-content/plugins/super-forms/uploads/php/files/0s40u38gsk9rhl0vv28a1ouhqu/xaliduvadejeluko.pdfIn PDF document text
    • http://tensoinox.com/userfiles/files/nigililemibufed.pdfIn PDF document text
    • https://wecafephuket.com/wp-content/plugins/super-forms/uploads/php/files/li2rdmbq61j6hgsk3373jlj1ab/79812115465.pdfIn PDF document text
    • https://choiceenergynetwork.com/wp-content/plugins/super-forms/uploads/php/files/3f58afb3f7282cdfcfc748c35d688de5/80604092930.pdfIn PDF document text
    • https://transport-vehicules.fr/userfiles/file/kesarov.pdfIn PDF document text
    • http://animalscipublisher.com/files/upfiles/file/85260712495.pdfIn PDF document text
    • https://www.lightingdynamics.com/wp-content/plugins/super-forms/uploads/php/files/9f7c7bf51964013a4cc7718144186315/25598371421.pdfIn PDF document text
    • https://lescourailleurs.com/upload/editor/file/lunejodumubaz.pdfIn PDF document text
    • http://lbs.ac.at/wp-content/plugins/super-forms/uploads/php/files/mcgqlvj1stqi3sthgif7l9h4b9/nonimubaroxogizataxodike.pdfIn PDF document text
    • http://md-servicios.com/userfiles/file/jenolinulejofuwikafilego.pdfIn PDF document text
    • https://www.kasekimi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608046c5a0c6a---77181252215.pdfIn PDF document text
    • http://www.gunyagder.org.tr/wp-content/plugins/super-forms/uploads/php/files/457586a4vjdn5ep1v989bu95p1/73488618701.pdfIn PDF document text
    • https://avonsteel.com/UserFiles/file/tigononekonaxuliwenam.pdfIn PDF document text
    • http://www.nanodrywash.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608136ec5ab4c---temolemuzakizutolipuze.pdfIn PDF document text
    • https://1sis.com/wp-content/plugins/formcraft/file-upload/server/content/files/160962c1e3b48e---10153377321.pdfIn PDF document text
    • http://jadeite.ru/images/file/kodujolagolafalik.pdfIn PDF document text
    • http://eastwoodfamily.net/userimages/lipetekew.pdfIn PDF document text
    • http://retailcop.ca/files/70358876709.pdfIn PDF document text
    • 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_off0000fde4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDE4 19056 bytes
SHA-256: 3a5ee53ac4064daffca011206a720e2dcac0be8170a70b29e98f9ebbe9abe309
font_01_sfnt_off00012f82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F82 10616 bytes
SHA-256: fa7a18a7a9cf5d46ce802923d82d8084ecd085f7644d6bee8d1bf346ef0747b4
font_02_sfnt_off000147af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x147AF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.