Malicious PDF — malware analysis report

Static analysis result for SHA-256 3b8a6e80a6d8c3aa…

MALICIOUS

PDF

81.5 KB Created: 2021-09-10 19:35:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: b7677fe964f9bac555859a196e640e24 SHA-1: 41df504a61b5827d7a219e692de3a2dc7ee6676f SHA-256: 3b8a6e80a6d8c3aaa145e02bae10d4bc5aa86641971d7769a5b016fed4ebcbc9
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs pointing to disposable hosting, indicative of a link farm designed to distribute malware. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' and the presence of a URL containing 'wwe+2k17+apk+download+for+android' strongly suggest a phishing or malware distribution lure. ClamAV detection further confirms its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 http://cabini.it/userfiles/files/fobusozenupegisakanogekes.pdf In PDF document text
    • https://printsolutions.ro/uploads/wysiwyg/files/fezur.pdfIn PDF document text
    • http://ganteltechnology.com/system/userfiles/file/nujabilokigiparizilu.pdfIn PDF document text
    • https://billard-hauri.ch/userfiles/file/71715734011.pdfIn PDF document text
    • http://meyanko.com/userfiles/file///64665265068.pdfIn PDF document text
    • http://villaturri.com/wp-content/plugins/formcraft/file-upload/server/content/files/161394b31ded36---75825502154.pdfIn PDF document text
    • http://uniquecharacters.com/upload/files/5949347161.pdfIn PDF document text
    • http://dokumsuzgec.com/userfiles/files/riwabewivimovokut.pdfIn PDF document text
    • http://www.ags-sib.ru/ckfinder/userfiles/files/jedejumipisaxifawilepimog.pdfIn PDF document text
    • http://mygiftltd.com/userfiles/file/xisefofut.pdfIn PDF document text
    • http://canadianartistic.com/userfiles/file/14022735345.pdfIn PDF document text
    • http://tbff-bygg.se/img/files/lubebolubiwuvuvokuvabopaj.pdfIn PDF document text
    • http://grupopiscis.com/upload/files/sajed.pdfIn PDF document text
    • https://functionalmovement.gr/wp-content/plugins/super-forms/uploads/php/files/683015faedd4e2b8bb7520aee683e4a2/zoratasobadojosuxugamov.pdfIn PDF document text
    • http://ulv-fogger.ru/d/files/jejux.pdfIn PDF document text
    • http://shipsupply.ru/userfiles/files/sasopezefatadalul.pdfIn PDF document text
    • http://vladjurnalist.ru/archive/file/85248625678.pdfIn PDF document text
    • http://www.bash.cl/media/file/jobasapodanedututav.pdfIn PDF document text
    • http://musicandyouapp.com/webupload/editorimg/files/69645083395.pdfIn PDF document text
    • http://culfordequestriancentre.org/UserFiles/file/47535967215.pdfIn PDF document text
    • http://www.horakgolf.cz/ckfinder/userfiles/files/54985082427.pdfIn PDF document text
    • http://stickerbarcode.com/file_media/file_image/file/fekewezujularidubuko.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=wwe+2k17+apk+download+for+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_off0000d88a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD88A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f09c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF09C 18716 bytes
SHA-256: a94c4ddd064b25b48aceac81c842fa388c5f59fc601741be1a4ce438c0a57ccb
font_02_sfnt_off00012060.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12060 10620 bytes
SHA-256: 980ceaff811ed9cd2e4fc472d92506d87b8de95ba970a5db5e8ba10949abedb6

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