Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d920495abc95193…

MALICIOUS

PDF

69.9 KB Created: 2021-04-24 08:27:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 2d9b76aa073997cc74bf2268550e84ee SHA-1: d4d2559eb74e1cb0f9600a122d398adea59274fb SHA-256: 6d920495abc95193dd9cf96e4cc8354bf4ec7259eb44a63549c4877d90fe2748
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9998

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://xajibur.ru/strik?utm_term=miller+bobcat+225g+plus+idle+module PDF link annotation
    • http://xufededubumavif.scienceontheweb.net/forogimowaxubuwegut.pdfIn PDF document text
    • http://pisibebix.22web.org/fonavedumi.pdfIn PDF document text
    • http://naliputa.mywebcommunity.org/brave_new_world_revisited_aldous_huxley.pdfIn PDF document text
    • http://extrameets.fun/145444325274j5yg.pdfIn PDF document text
    • http://unityfree.xyz/22633524776cx183.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408584/normal_5fe8777b9628a.pdfIn PDF document text
    • https://cdn.sqhk.co/xedaberetaj/7jdwqhe/masevelavola.pdfIn PDF document text
    • https://cdn.sqhk.co/suxujaba/hhjghaC/53282940742.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453550/normal_6035ba6f37713.pdfIn PDF document text
    • http://fisareboveda.getenjoyment.net/management_skills_assessment_questionnaire.pdfIn PDF document text
    • http://lenuboza.iblogger.org/topenu.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/setigafat/how_to_clean_a_fujitsu_scansnap_s1500.pdfIn PDF document text
    • https://s3.amazonaws.com/fejakixoweka/27768898302.pdfIn PDF document text
    • http://sabiwilurase.atwebpages.com/xoralaragozorizaxejog.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d19c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD19C 5796 bytes
SHA-256: 37fa416bd782440432c043b7159db5607ebaaf1821c159149ad6a14d2c2eb6ce
font_01_sfnt_off0000e54b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE54B 10408 bytes
SHA-256: 992a1152599c43506dbb096c75a40cfde7576d01192a9f3a8587e83ec2bf0937

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