Malicious PDF — malware analysis report

Static analysis result for SHA-256 9afcdaaa37319b56…

MALICIOUS

PDF

83.8 KB Created: 2021-08-17 20:21:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 25cf5037ad09dea16d86c6cd47760928 SHA-1: 9abe54190ef415ef9d0b85b5ee0368f031c52df4 SHA-256: 9afcdaaa37319b56a8d561a7acd5d3a766b3c38682098d102234987f77df7b27
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many of which point to compromised CMS upload directories or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of these links and the overall structure strongly indicate a phishing or redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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 https://www.alongsideasia.com/wp-content/plugins/super-forms/uploads/php/files/1746f1bcb670abdbf3f99977677a95f9/51555036378.pdf
    • http://canvangdientu.com/images/file/16353971792.pdf
    • https://lusagroup.mobi/images/website/user/files/maxagug.pdf
    • http://objetivovender.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a426e7ee365---88613765663.pdf
    • http://iamsoldierfit.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609dfb5b3f42d---94221463246.pdf
    • https://oknoplus-omsk.ru/wp-content/plugins/super-forms/uploads/php/files/70910be41e82dbdc386938556102d453/sipaxeki.pdf
    • http://halvani.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078d1f12aa34---50615875899.pdf
    • https://janeunchained.com/wp-content/plugins/super-forms/uploads/php/files/5c3djr2l0gvu2sle3v74ibpkmv/wugemakawexinepexapubugel.pdf
    • https://www.grandiosa.is/wp-content/plugins/super-forms/uploads/php/files/fol2bumu208oc62aaubhcpr524/pusimuzujebojilire.pdf
    • http://vdgairconditioning.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160e3e71fe4d74---jatezupowupogegugokazelik.pdf
    • http://bmcsteel.com/uploads/baiviet/files/guxekapuriguxawigataj.pdf
    • http://novaserv.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607294544f3c0---josutoxuke.pdf
    • http://sinara.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607fa3bb99f34---tivakurenelosabuwugigagos.pdf
    • https://g-ortho.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607819972c742---48923802976.pdf
    • http://falconartistmanagement.com/ckfinder/userfiles/files/1143231190.pdf
    • https://www.picmephotoboothhire.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160b5706a69960---vojupix.pdf
    • http://for-rent-aalst.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cd7072478c---teguras.pdf
    • http://bazatalty.pl/wp-content/plugins/super-forms/uploads/php/files/2795be1bcd45bac0b1e1ee8eca42f355/27046481544.pdf
    • http://teplolux72.ru/upload/file/miliponozatemi.pdf
    • http://vipavtoufa.ru/wp-content/plugins/super-forms/uploads/php/files/dcf2c2d8656329c3ff1b53eac2da284c/61737832304.pdf
    • http://studioriggio.it/userfiles/files/17807263144.pdf
    • https://baobihungphu.com/media/ftp/file/vasoxelobabijowiruximo.pdf
    • https://www.allterra.group/wp-content/plugins/super-forms/uploads/php/files/14ed33bd4628f9f7f96427c051fb49c6/64495775696.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=electronica+de+potencia+muhammad+rashid+pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dffd.bin
2b6804c1468654ef5a035f6269b947a1cc5f778ded34bea59c4975b745cd991a
pdf-font-stream PDF embedded font (sfnt) at offset 0xDFFD 10968 bytes
font_01_sfnt_off0000f934.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF934 16792 bytes
font_02_sfnt_off00011146.bin
3a1b3e92794294ec6db2c50beb76abc452d47025fa69f0e990d784949243350f
pdf-font-stream PDF embedded font (sfnt) at offset 0x11146 17768 bytes