Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab29a9d8abcd837c…

MALICIOUS

PDF

87.9 KB Created: 2021-07-30 02:50:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: eb76f7f804c80e78b18bb4f7913d3c20 SHA-1: d142c02c6c495c13331aa9f720378517b679f63f SHA-256: ab29a9d8abcd837c9a9104a1162adafc4a9b717f7f79909fcbf3b609d20e8d6d
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links to external websites, many of which appear to be compromised WordPress installations used for hosting PDF files. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' indicates the document likely provides password instructions for an archive, a common tactic to bypass gateway security by encrypting the actual payload. No scripts were extracted, but the presence of multiple external links suggests a downloader or redirection mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9957

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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=autocad+map+3d+2018+tutorial+pdf PDF link annotation
    • http://www.supercarrentalsofmiami.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079eb3ee3753---tofodogawujobe.pdfIn PDF document text
    • http://intechsol.kz/wp-content/plugins/formcraft/file-upload/server/content/files/160b79f0579269---divizimijex.pdfIn PDF document text
    • https://mmagame.com/userfiles/file/jewabasakodoke.pdfIn PDF document text
    • http://artmetinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d59b0806e5---jutozotupononofisubudexex.pdfIn PDF document text
    • https://cvenhancer.com/wp-content/plugins/super-forms/uploads/php/files/30d3c4e878e1cfae08f2e72972c165b6/lenoxewotezuvugipike.pdfIn PDF document text
    • https://akarchlight.com/wp-content/plugins/super-forms/uploads/php/files/7191a90ceb178b81900ee1d9249f27d2/lawadigamodaderarovuj.pdfIn PDF document text
    • https://daleel.global/wp-content/plugins/super-forms/uploads/php/files/s85jq78p7ls9e4b55o1pbdt837/84921671147.pdfIn PDF document text
    • http://clingac.com/d/files/sitatadodugopuluzume.pdfIn PDF document text
    • https://avenirpourtous.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1608e9092c86c3---webitubugemewosotijira.pdfIn PDF document text
    • http://gramercygrand.ru/files/file/lokeregugosuvi.pdfIn PDF document text
    • http://latexindia.com/userfiles/file/wobirumo.pdfIn PDF document text
    • https://cashofferoregon.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071a59dc3baa---wigeroko.pdfIn PDF document text
    • https://tirthmobile.com/wp-content/plugins/super-forms/uploads/php/files/867qp7hkkt19ia98j579gcp4m1/wilifusetax.pdfIn PDF document text
    • https://bestcoloringpages.com/userfiles/file/sowedatewika.pdfIn PDF document text
    • http://uitetenindex.nl/images/uploads/wojuxesefelutusag.pdfIn PDF document text
    • https://immo-cjeanpaul.lu/userfiles/files/74235473158.pdfIn PDF document text
    • http://zartmobilia.com/userfiles/file/20210521192212.pdfIn PDF document text
    • http://maekalocal.com/Maeka/UserFiles/File/79397051142.pdfIn PDF document text
    • http://gabortech.com/admin/file/25974126040.pdfIn PDF document text
    • http://yatros.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1606d52ac67ef6---80569673755.pdfIn PDF document text
    • https://slavica.ru/wp-content/plugins/super-forms/uploads/php/files/045a98c305c1c815ce80f5306b1224d8/zububuzaki.pdfIn PDF document text
    • http://coimbrasoftware.hu/images/uploads/files/jinojilud.pdfIn PDF document text
    • http://ugrctrani.it/userfiles/files/13770903979.pdfIn PDF document text
    • http://www.virtualaid.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16103239d1eb1a---39868949362.pdfIn PDF document text
    • https://www.costaverde.it/wp-content/plugins/formcraft/file-upload/server/content/files/160b6146c40321---fujuxojisavitutelixivif.pdfIn PDF document text
    • http://winhazel.com/indigo/ckfinder/userfiles/files/geguzemomiwekirunis.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_off0000f0ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0EE 17492 bytes
SHA-256: a51ccd241a98865dc87197a6d41be39ed341afe1c3fa946fc40a0203d2d18970
font_01_sfnt_off00011f47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F47 11132 bytes
SHA-256: a4b01e2d93ffc738462574a12f56d5705b773e499db5fcc964aaf21b6c6f2c04
font_02_sfnt_off00013962.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13962 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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