Malicious PDF — malware analysis report

Static analysis result for SHA-256 d46d0f47e6429614…

MALICIOUS

PDF

78.6 KB Created: 2021-05-16 10:37:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 7d7cd0d247162a228e9c1d6e26450ff8 SHA-1: 0873186ea9b696d4e28fe347447ea66d1c7eb191 SHA-256: d46d0f47e64296146d7b0d37d55d0fd506cfa8ea9f6783d12be5ba938af31eb8
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, a common tactic for phishing or malware distribution, as indicated by the PDF_SEO_LINK_FARM heuristic. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the presence of embedded URLs and the overall structure point towards a phishing or malware delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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 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.
  • 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/strik?utm_term=you+raise+me+up+sheet+music+piano+and+voice PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4445888/normal_60038f63bf798.pdfIn PDF document text
    • https://cdn.sqhk.co/sewadokoka/ibjggj9/nizesulag.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393632/normal_5feafb5fbb3b8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4422628/normal_5fc8e5953c345.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4492245/normal_6067776f3eeac.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450336/normal_5ff411419d19e.pdfIn PDF document text
    • https://cdn.sqhk.co/metajewamiva/eWJiajj/primitive_bubble_pop.pdfIn PDF document text
    • https://cdn.sqhk.co/jabezoxujo/ifgjjjC/9783661845.pdfIn PDF document text
    • https://cdn.sqhk.co/buxoxurobewi/Egdjeic/table_soccer_app.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jajojukadas.epizy.com/5038730728.pdfIn PDF document text
    • https://s3.amazonaws.com/xasovewipeje/vezonazub.pdfIn PDF document text
    • https://s3.amazonaws.com/padanivozeb/vugipadoxajupurilixujafox.pdfIn PDF document text
    • http://jojovezelel.rf.gd/rafojomisososodijuzi.pdfIn PDF document text
    • https://a161ff94-1a6f-4367-b6f8-8e513a5e676d.filesusr.com/ugd/4c7633_720158f3a2ef4330a51ae22f21ad0dd0.pdf?index=trueIn PDF document text
    • https://f7cac2f2-528f-490f-9bef-cb2448a877de.filesusr.com/ugd/529ba0_1561615ea1b646248984aad645fe88ab.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xeroguru/19277043173.pdfIn PDF document text
    • http://vawerixudebaf.rf.gd/explosive_welding.pdfIn PDF document text
    • https://s3.amazonaws.com/julexekubaj/1349483279.pdfIn PDF document text
    • https://s3.amazonaws.com/nojemi/tijanobigubujipomigi.pdfIn PDF document text
    • http://bolunivagoxel.epizy.com/xaguxunuzuku.pdfIn PDF document text
    • https://s3.amazonaws.com/nosepevozux/the_100_season_4_episode_13_wiki.pdfIn PDF document text
    • https://s3.amazonaws.com/doxifuba/72701191947.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_off0000f419.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF419 5300 bytes
SHA-256: d79652ad424085465190859594295177bbb4f75346cb63b68a5f281ec60c5bd5
font_01_sfnt_off000105fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105FA 11228 bytes
SHA-256: 8e766a783189c19ff808bdeb3fb45a54e9ac46de0a59de9ac97d643b03f1d12c

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