Malicious PDF — malware analysis report

Static analysis result for SHA-256 2afe730a07296138…

MALICIOUS

PDF

82.5 KB Created: 2021-09-18 07:45:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 1f02577c89ad65a35e4385a12d97d720 SHA-1: 679d8aaf8a915cd79e1f02559c1003538302b17e SHA-256: 2afe730a072961384a6ca5fd47e0e5b4f2f863bf6a42a3113a36f7df747bc954
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links to external websites, many of which are hosted on compromised WordPress sites or disposable domains. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' and the presence of 'utm_term' parameters in URLs suggest a phishing or scam attempt to lure users into downloading files. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://pixomot.ru/uplcv?utm_term=windows+10+download+for+laptop+64+bit+full+version PDF link annotation
    • http://christembassydocklands.org/wp-content/plugins/super-forms/uploads/php/files/b6a2d9088b46afb69f640bab05ccacad/tonara.pdfIn PDF document text
    • http://tentimesneedlehill.com/UPFILE/userfiles/files/4067838873.pdfIn PDF document text
    • https://tl-systems.hu/files/files/rifadititeribosodinebara.pdfIn PDF document text
    • http://hatowo.com/app/webroot/uploads/files/33316697516.pdfIn PDF document text
    • http://problemconsulting.com/img/download/files/xorib.pdfIn PDF document text
    • https://ccichn.vn/data/upload/file/nusodewepemerexokil.pdfIn PDF document text
    • http://zhjpharm.com/upload/files/zawekisi.pdfIn PDF document text
    • http://baoveantam.info/upload/files/sodej.pdfIn PDF document text
    • https://vatlieutaphu.com/upload/files/firezaxebuninumos.pdfIn PDF document text
    • http://www.gonouvellezelande.com/files/48323026676.pdfIn PDF document text
    • https://autosofortkauf.ch/wp-content/plugins/super-forms/uploads/php/files/ieilksrim7j5it30p6i9fon949/junoseziraxuwelazad.pdfIn PDF document text
    • http://cantinachitarra.it/userfiles/file/696664677.pdfIn PDF document text
    • http://pdww.ru/ckfinder/userfiles/files/77990479283.pdfIn PDF document text
    • http://wimborst-ceramics.nl/public/view/upload/fckeditor_images/file/52768319895.pdfIn PDF document text
    • http://akademia-jedenastka.pl/zdjecia/fck/file/vitusobuxeno.pdfIn PDF document text
    • http://bndweb.nl/upload/files/95154705373.pdfIn PDF document text
    • https://kga-am-adlergestell-ev.de/kga/ckfinder/userfiles/files/59033011291.pdfIn PDF document text
    • http://patronusalapitvany.hu/public_html/upload/39255476416.pdfIn PDF document text
    • https://slotpt2.com/contents/files/niziwasopitoxon.pdfIn PDF document text
    • http://aaexpansionjoint.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614007ba2c53a---sevitukedefatovadipegapa.pdfIn PDF document text
    • http://emanuelarombiarchitetto.eu/userfiles/files/34138292804.pdfIn PDF document text
    • https://topclassgreenery.nl/images/file/69257965418.pdfIn PDF document text
    • http://nacyc.jp/Upload/file/40359123622.pdfIn PDF document text
    • http://geasit.it/userfiles/files/zaridajuxinivabimukituxu.pdfIn PDF document text
    • http://royal-pizza.eu/files/file/zorulir.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_off0000dbd2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBD2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f3e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3E4 17716 bytes
SHA-256: 346a587470901ff74f11627f8ff30054b5d129101a91a21a34d0243741816fe6
font_02_sfnt_off00012160.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12160 11296 bytes
SHA-256: 878ae5c96a30e5f70d542e49baee278d4a8a1e0ac48b530eebf6140f0340b295

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