Malicious PDF — malware analysis report

Static analysis result for SHA-256 97b4ba0d90eb6595…

MALICIOUS

PDF

73.6 KB Created: 2021-03-22 10:59:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 6867a81bb35990ee5d9afc6749420468 SHA-1: 524699a70d91b039e793a738dbb31a31854da855 SHA-256: 97b4ba0d90eb65954a253d99917550c01eed10b94c2cbba5e0e6b215a0e73c38
186 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. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://gimoguvi.ru/award?keyword=analytical+verb+list+pdf PDF link annotation
    • http://euroshopme.site/86161431641dsrys.pdfIn PDF document text
    • https://paseruvuweduzuw.weebly.com/uploads/1/3/1/4/131437476/limipivoxugefomudu.pdfIn PDF document text
    • https://cdn.sqhk.co/sevalaturi/fs02nvJ/wonefapesidazadapin.pdfIn PDF document text
    • https://luwujapi.weebly.com/uploads/1/3/4/7/134751522/govutapajepig.pdfIn PDF document text
    • http://bnl-jobs.com/comparison_worksheets_for_grade_3c5vwe.pdfIn PDF document text
    • https://cdn.sqhk.co/ledodatefu/Tg4jdks/dragon_priests_skyrim_locations.pdfIn PDF document text
    • https://cdn.sqhk.co/zasemewiti/eYcH4DN/lezopijip.pdfIn PDF document text
    • http://uchebnoe.website/883495574554e0v7.pdfIn PDF document text
    • https://cdn.sqhk.co/xefilelo/0geWrhj/23673176339.pdfIn PDF document text
    • http://alcexpress3.xyz/list_of_moral_values_for_studentsdp21w.pdfIn PDF document text
    • http://mestorating.ru/duwojawb4x.pdfIn PDF document text
    • https://cdn.sqhk.co/durotula/kyq1ghj/service_professor_commercial.pdfIn PDF document text
    • https://cdn.sqhk.co/jegivoziba/gfjfary/surarumitubab.pdfIn PDF document text
    • https://felomavemupej.weebly.com/uploads/1/3/4/5/134583365/xuxidalofi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/luborinizu/xusawovaw.pdfIn PDF document text
    • https://s3.amazonaws.com/xirixepo/pacman_frog_care_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/dojonuta/urinary_tract_infection_guidelines_veterinary.pdfIn PDF document text
    • https://s3.amazonaws.com/gaxuremewuger/98314118256.pdfIn PDF document text
    • https://s3.amazonaws.com/fukepez/who_did_the_norse_god_odin_have_as_handmaidens.pdfIn PDF document text
    • https://s3.amazonaws.com/lekelepowo/wisoxodakidedi.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://scripts.sil.org/OFLIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e35b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE35B 5440 bytes
SHA-256: 1493a6617dd9bbb7400b4a5f41e27742a2e3714192b045e169e228c4f013d6f8
font_01_sfnt_off0000f5f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5F3 10264 bytes
SHA-256: c8bd6f5035382320df08ecfdb5dc838003c0ec046abbe8cce9bc457af1c45db0

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