Malicious PDF — malware analysis report

Static analysis result for SHA-256 42a31e950904245a…

MALICIOUS

PDF

87.5 KB Created: 2021-03-09 07:43:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 9efde86b381d9197b28523b72197f47d SHA-1: 9ba1a9ae9dcee350341f420ecfd33aceb4fc2e39 SHA-256: 42a31e950904245a545bfa65b17737739d37716f768c401fa981a9aa224b4f3f
186 Risk Score
Tags
free-cdn-ebook-manual-lure

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://pelibifir.ru/wix?keyword=word+whammer+destruction PDF link annotation
    • https://sedanafijokam.weebly.com/uploads/1/3/4/8/134888359/403e13412.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4496815/normal_5ff3e0c5a1f00.pdfIn PDF document text
    • https://garupiripo.weebly.com/uploads/1/3/4/3/134386314/8385862.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381978/normal_60209673d9ccd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4464874/normal_5fe5d6ed6cc50.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424349/normal_60285b78e23f5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443809/normal_6023e546e075e.pdfIn PDF document text
    • http://front-glass.space/42646770176admg6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382793/normal_6035f0713b1fd.pdfIn PDF document text
    • https://zolaverapudo.weebly.com/uploads/1/3/0/8/130874102/6993950.pdfIn PDF document text
    • http://repochka.site/rukejarejuxvbr2.pdfIn PDF document text
    • http://lofitner.buzz/daditimopakixivuferckh9.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/xezonijida/auto_tune_artist.pdfIn PDF document text
    • https://s3.amazonaws.com/dukexajuj/zidarulaxekomeberasogarip.pdfIn PDF document text
    • https://s3.amazonaws.com/seriposuj/11512345617.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dabc345e-19cf-4a07-93e5-ad118a5465a4/deltek_costpoint_user_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5d36b5e2-a5c7-4bb9-8980-3965b4c6548b/32789829406.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001035a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1035A 5252 bytes
SHA-256: b96947e8c5aa1927bbe6aaf302789a398bc3c76776788068aa1c253912f5a59f
font_01_sfnt_off00011522.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11522 11148 bytes
SHA-256: 87b2a3083b59b1017e22c19b0b97e7cebb5f6bb71a7318b76434ea0cdfa725bf
font_02_sfnt_off00013b68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13B68 16376 bytes
SHA-256: 069f5cdcb972b33999f3dc18a3e5b847fc2aa024b7c5b45b4734cedf253a8e5c

Open this report in the interactive analyzer, or submit your own file for analysis.