Malicious PDF — malware analysis report

Static analysis result for SHA-256 5362a94d6ed79172…

MALICIOUS

PDF

96.3 KB Created: 2021-06-25 05:06:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-01
MD5: f622a153af80cb83ecf659080ff2dd80 SHA-1: 0a4be7e88901878c8eb320f7c51c8b2139752bd4 SHA-256: 5362a94d6ed791724535d68eedcb6e4849bfbf885598adee8c00dddfbec13e15
156 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://drafthe.ru/uplcv?utm_term=arcot+panchangam+2020+pdf PDF link annotation
    • https://elearning-chemistry.ro/userfiles/file/87296759368.pdfIn PDF document text
    • http://www.psoealora.es/ckfinder/userfiles/files/xutozidaji.pdfIn PDF document text
    • http://beerskiboot.de/img/upload/file/pibenefiden.pdfIn PDF document text
    • http://fanti-fitness.pl/uploads/assets/file/86791035193.pdfIn PDF document text
    • http://www.sevenchurchestour.net/seven/wp-content/plugins/formcraft/file-upload/server/content/files/160c5e6a6d0019---jexin.pdfIn PDF document text
    • http://www.mezmat.ru/ckfinder/userfiles/files/zopexagudala.pdfIn PDF document text
    • http://coffee33.ru/archive/file/15415522990.pdfIn PDF document text
    • http://ithaca1966.com/clients/8/85/85e9e0a76fddb83d7689cebc6ab07fae/File/kuwurag.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/16075fd57b637c---garazazejasalizupodujisep.pdfIn PDF document text
    • https://www.rydalmereprestige.com.au/wp-content/plugins/super-forms/uploads/php/files/nt5rn8qj535emojslv3i051m2g/95215829787.pdfIn PDF document text
    • https://ivfnna.gr/wp-content/plugins/super-forms/uploads/php/files/2beccd447d2efa673d55788048d047ad/kenoxafifoxotabumemavo.pdfIn PDF document text
    • https://www.latentoac.com/portal/wp-content/plugins/super-forms/uploads/php/files/mpt8vemf19st4al692vabqtpi6/99214920725.pdfIn PDF document text
    • https://shotclock.ca/wp-content/plugins/super-forms/uploads/php/files/dcd650df8e9bbba8f9b6df8d31c4290f/93207213506.pdfIn PDF document text
    • https://terravistahometeam.com/wp-content/plugins/super-forms/uploads/php/files/883c1de2b77c29d1fbcbe19bd7d0404d/ritexonolidekafejeder.pdfIn PDF document text
    • http://best-infosystems.com/userfiles/file/tugavopadubuziw.pdfIn PDF document text
    • http://nowyhotelik.pl/userfiles/file/49528077551.pdfIn PDF document text
    • http://alnoorcity.com/userfiles/file/7595077641.pdfIn PDF document text
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/qeni94fcfvrdv63a4u89vmhhq6/49607532393.pdfIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00010fd7.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x10FD7 22460 bytes
SHA-256: 786bb91b7d92c998d7f6be75517acb785015ed891f2824e476912b38183b8283
font_00_sfnt_off0000fce2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCE2 5620 bytes
SHA-256: 4e5bee205d855b4bae3069936389cd15c4b3cab0e10271bdcbe200b9dd6c544a
font_02_sfnt_off00013f99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13F99 12156 bytes
SHA-256: 5b74ea7a59b00fe09b025ed536e9b6e9a5e5e3b7ded6f5398ec51701f2487dba
font_03_sfnt_off000166c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x166C8 3044 bytes
SHA-256: 7f46debd2117372e0fe76a9980d1969f316cba854b03d228ebc86a8d065d5dc4

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