Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f67e7903623bb20…

MALICIOUS

PDF

79.3 KB Created: 2021-08-16 06:09:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: e53e7d8e562998a353fb8e269f4a87ea SHA-1: c9bdb1059044c7fe9492366dd621337a79899392 SHA-256: 9f67e7903623bb20c4d82ef3c9feae5ae2e6e5fcb3e286d9b1b49fbca8384291
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The file contains numerous links pointing to potentially compromised websites and disposable hosting, suggesting an attempt to redirect users to malicious content. While no scripts were explicitly extracted, the nature of the heuristics and the presence of embedded URLs strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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
  • 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://kamerton.nl/clientfiles/larutefuvafimewozilamu.pdf In PDF document text
    • http://plnjl.com/userfiles/files/wuzatomaneteriv.pdfIn PDF document text
    • https://godahoian.com/app/webroot/upload/files/1564476674.pdfIn PDF document text
    • http://le-lemniscus-incandescent.fr/ckeditor/upload/files/95235662961.pdfIn PDF document text
    • https://gaseg.com/wp-content/plugins/super-forms/uploads/php/files/80f77agjt897gv3oc4ve6btsc5/wuziliwobizatixenewow.pdfIn PDF document text
    • https://celovechurch.org/wp-content/plugins/super-forms/uploads/php/files/41ffb08a042b1c88f185c69d5ec7327e/86755195413.pdfIn PDF document text
    • http://vin-baietii.ro/ckfinder/userfiles/files/63896995637.pdfIn PDF document text
    • https://jasz-pap.hu/UserFiles/file/66036297064.pdfIn PDF document text
    • http://ahkjt.com/upfile/file/66152030381.pdfIn PDF document text
    • http://hitplus.eu/userfiles/file/funumajusenitizad.pdfIn PDF document text
    • https://metroguards.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1606f13c5eebef---lebera.pdfIn PDF document text
    • http://orderleesushi.com/uploads/files/bemexiwap.pdfIn PDF document text
    • http://lnshiyue.com/userfiles/file/20210701152639_1105368536.pdfIn PDF document text
    • https://www.okcfarmersmarket.com/wp-content/plugins/super-forms/uploads/php/files/26f9958903419fe1133a7744712efcb7/6841482297.pdfIn PDF document text
    • http://christembassydocklands.org/wp-content/plugins/super-forms/uploads/php/files/47604f1647357e7910665cb998622bba/pagabutedolepulesaw.pdfIn PDF document text
    • http://www.hcibatiment.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160b0d2a49241e---ruwamaf.pdfIn PDF document text
    • http://luvnchrlysenglishtoys.com/clients/861429/File/sudonok.pdfIn PDF document text
    • https://cruiseship.cruises/wp-content/plugins/super-forms/uploads/php/files/ssfcnkk5mql1n8tmcqrsa7u6hm/pivigimutiludaf.pdfIn PDF document text
    • http://www.laterveer-biesenbeek.nl/ckfinder/userfiles/files/zunerudilufozeliw.pdfIn PDF document text
    • https://ecotranslation.ca/upload/editor/file/ranabitekalalojuta.pdfIn PDF document text
    • http://bhk-aindling.com/userfiles/files/91825135169.pdfIn PDF document text
    • https://sensesgrouphk.com/louis/STARKGROUP/ckfinder/userfiles/files/zaxilemevagowur.pdfIn PDF document text
    • https://www.etbsupplies.com/wp-content/plugins/formcraft/file-upload/server/content/files/160743bb801fd0---rijopoxubis.pdfIn PDF document text
    • http://szentimresiklos.hu/upload/file/zifuzokiroxadajedotuw.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=bhagavad+gita+summary+in+hindi+pdfPDF 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_off0000d26f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD26F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ea86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA86 10980 bytes
SHA-256: 9bf151ddc3d588fad62b24a8f9b406576382e5ed94c1b97e3aaef0782f2ca556
font_02_sfnt_off000103ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103AD 16136 bytes
SHA-256: 3c4dd6c4f399a22a42a43e8904c5a8ee92abb211695313c194cd786cc66e4664

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