Malicious PDF — malware analysis report

Static analysis result for SHA-256 222bb6f2ad6c770a…

MALICIOUS

PDF

75.9 KB Created: 2021-07-21 18:23:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: ac8e9670a0ee922680055a5845dbc655 SHA-1: a80c09e825786d547271244fbdf466b3355584c3 SHA-256: 222bb6f2ad6c770aeb2749da8c1bf81baed5f3c290fe4041a2aeee3aa3bea8f6
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is identified as malicious by ClamAV and an ML classifier, with heuristics indicating embedded JavaScript and a link farm pointing to potentially compromised WordPress sites and raw IP addresses. The presence of embedded JavaScript suggests an attempt to execute malicious code, likely to download further payloads or redirect the user to phishing sites. The numerous external links, many hosted on disposable domains or IP addresses, reinforce the phishing or malware distribution intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://xn--80akij1ajew.xn--p1ai/wp-content/plugins/formcraft/file-upload/server/content/files/160b16ff0c8528---xakuraguditewumiwanijuv.pdf
    • http://herodumpsterrental.com/wp-content/plugins/super-forms/uploads/php/files/8117b9baa177f5855cecf5b5f83439a7/81082042123.pdf
    • https://lakeshoresmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/33tkmmk679or437djb8io77146/86110709906.pdf
    • http://inwama4.vn/webroot/img/files/88935087073.pdf
    • http://kappp.ru/js/ckfinder/userfiles/files/75688776298.pdf
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/160c9827e4b538---lobonazonirasukekon.pdf
    • https://inncredel.com/uploads/loguwulizelilopadinemar.pdf
    • https://hobbes-group.com/upload/files/tawobif.pdf
    • https://chokysitohang.com/Uploads/userfiles/files/dizifite.pdf
    • https://wecareu.net/ckfinder/userfiles/files/gamolagupabulezusuxe.pdf
    • https://www.gsccn.it/wp-content/plugins/formcraft/file-upload/server/content/files/16074d1a6d65d7---vagematoma.pdf
    • https://www.helpforbusymums.com/wp-content/plugins/super-forms/uploads/php/files/16493ffa940f01b6c4f99df806f384fd/savitedugib.pdf
    • http://phenix-security.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1607acb1c71324---22344205358.pdf
    • https://ecoinkworld.com/wp-content/plugins/super-forms/uploads/php/files/0c556831c4de670f311cf63e44abd38c/peviroxuda.pdf
    • http://bjzjygj.com/fckeditor/editor/filemanager/connectors/php/userfiles/file/pupiwe.pdf
    • http://rcp-ranstadt.us/files/pozuvema.pdf
    • https://condicionamentofisico.com/arquivos/file/guzizitixinagoxotogonelu.pdf
    • https://www.simplythebestevents.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16087047d717b0---wibowagimijofipirarose.pdf
    • http://cn-polylysine.com/d/files/velevorozixenanazu.pdf
    • https://edcasys.com/ci/userfiles/files/visaxuzorimo.pdf
    • http://begemot-rus.com/uploadfiles/file/2021051919062073499.pdf
    • https://www.deuba.info/wp-content/plugins/super-forms/uploads/php/files/a0gv95ikkqvnil5gukbq83m84m/xemezowomegulixe.pdf
    • http://homestationrealty.com/userfiles/files/luwidiwobuxekipemolafete.pdf
    • http://clairvoyantinfotech.com/demo/images/farowonimoko.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=earth+wind+and+fire+songs+fantasy
    • 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_off0000c30d.bin
5138679edff1f0780c4638b80f32878e73428321b0c4f3a0e85e9fd85cc47746
pdf-font-stream PDF embedded font (sfnt) at offset 0xC30D 16880 bytes
font_01_sfnt_off0000edfc.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xEDFC 16792 bytes
font_02_sfnt_off00010613.bin
7dbbbf0d3b2292333bd13927059230946fea1b662fe21375815302b6e03d0c58
pdf-font-stream PDF embedded font (sfnt) at offset 0x10613 10768 bytes