Malicious PDF — malware analysis report

Static analysis result for SHA-256 e01dde0a77e99f02…

MALICIOUS

PDF

78.5 KB Created: 2021-02-13 07:51:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 9d4fbc9b6c88378c665ee33413a7e018 SHA-1: 23e7f45a0012202b69950fe861b9cf515b66f564 SHA-256: e01dde0a77e99f0265d1d6d6953fcfa34fe3acd39286fa5ccc3b260a602bf76b
156 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 0.9998

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 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://bologen.ru/123?utm_term=negative+effects+of+population+control PDF link annotation
    • http://lishop.site/opat_beep_test_scorecard9x42m.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369768/normal_601e58a29f500.pdfIn PDF document text
    • https://cdn.sqhk.co/gefisodir/ibAhdjd/idle_universe_divine_powers.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368223/normal_5fe02adf5ab21.pdfIn PDF document text
    • http://dkmz3.club/54530076039fep6r.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382413/normal_601c7952b516b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412599/normal_5fe8336f2bba5.pdfIn PDF document text
    • http://thedouche.xyz/67767358788149o2.pdfIn PDF document text
    • https://dixonojobu.weebly.com/uploads/1/3/3/9/133997274/tixikidelu.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/lomogas/accidents_reported_near_me_now.pdfIn PDF document text
    • https://s3.amazonaws.com/tulosa/guild_wars_2_armorsmith_guide_0-_400.pdfIn PDF document text
    • https://s3.amazonaws.com/bidurudilidujug/titexom.pdfIn PDF document text
    • https://s3.amazonaws.com/rodiligarexo/terminator_2_theme_song.pdfIn PDF document text
    • https://s3.amazonaws.com/selivuvumepaveb/esc_esh_arterial_hypertension_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/kokesatodixon/16062285371.pdfIn PDF document text
    • https://s3.amazonaws.com/rodiligarexo/tosagab.pdfIn PDF document text
    • https://s3.amazonaws.com/kabisebax/livre_guide_new_york.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_off0000f617.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF617 5212 bytes
SHA-256: c77a280f4686f55c6acc77e9ddf68cdb426d4ce190f0cc3f0514a5dd9a8b1f5b
font_01_sfnt_off000107fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107FB 10760 bytes
SHA-256: 67cc0f2f0dd62e29998488fd4537328bf6377ce12d37564224b254d0193d5243

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