Malicious PDF — malware analysis report

Static analysis result for SHA-256 3af60a9a03824dd9…

MALICIOUS

PDF

104.9 KB Created: 2021-02-11 17:19:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: eed54bd777781dbb565a38f33e7252e5 SHA-1: eb148b821ee650a21cdcea04371b960780c6de2f SHA-256: 3af60a9a03824dd911e7b9fab44125cc91d5a6829177222206742c08f98974bb
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous embedded URLs, with a primary focus on directing the user to a website that appears to be a search result for educational materials. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The presence of multiple external URIs and a link farm heuristic further supports the classification as a malicious document designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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 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://jottigo.ru/wix?keyword=go+math+grade+5+chapter+7+test+answer+key+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4484358/normal_6016dbb2e7194.pdfIn PDF document text
    • https://todumubisopid.weebly.com/uploads/1/3/5/3/135312552/822fd8.pdfIn PDF document text
    • https://nusutaligufobam.weebly.com/uploads/1/3/5/3/135393176/e71561baa3301.pdfIn PDF document text
    • http://lumapon.iblogger.org/run_time_error_1004_protected_sheet.pdfIn PDF document text
    • http://everydayy.fun/7866422716502b04.pdfIn PDF document text
    • https://rixagebama.weebly.com/uploads/1/3/0/7/130738507/a338c5165043ba.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4455659/normal_600201ff7994c.pdfIn PDF document text
    • http://monstergym.ru/fusep3tzop.pdfIn PDF document text
    • http://submonster.xyz/how_to_typewm14m.pdfIn PDF document text
    • http://lastmarkt.ru/60099863350cwelx.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4419650/normal_5ff2e4e16f9e4.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://julizut.rf.gd/bivamisufopimiv.pdfIn PDF document text
    • http://bejiteviv.epizy.com/cabal_online_blader_guide_2018.pdfIn PDF document text
    • http://metoduzudo.rf.gd/33812532654.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00014daa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14DAA 5772 bytes
SHA-256: c629250e72f6089d240ea33e4ec02468eb140c2b060147bfa53e0e2d67a33299
font_01_sfnt_off0001614e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1614E 11344 bytes
SHA-256: 672a0c2e0a92b48b43fc1e8d81948a5c557ec838b5ab4573781ade9105a2aaa6
font_02_sfnt_off000187ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x187EE 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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