Malicious PDF — malware analysis report

Static analysis result for SHA-256 730a741cb31ac127…

MALICIOUS

PDF

79.2 KB Created: 2021-03-17 06:45:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: cff504fa62d3d2b022d2ae30bd3805a5 SHA-1: 2666e3aec021771b63bdf03343779e45b31e828f SHA-256: 730a741cb31ac1276e49c6cd76253a8dbfc3fbc9466521214aa66051a19af41f
156 Risk Score

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 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://kuzutuzo.ru/123?utm_term=ccna+200-+301+syllabus+pdf PDF link annotation
    • http://yoga-italy.space/wabudawitatinadivofenoh63n.pdfIn PDF document text
    • https://xikigojajutu.weebly.com/uploads/1/3/4/3/134385057/2837804.pdfIn PDF document text
    • https://sugasukeni.weebly.com/uploads/1/3/4/8/134878852/1772523.pdfIn PDF document text
    • https://bavamelamasol.weebly.com/uploads/1/3/4/7/134714994/talixafodufeja.pdfIn PDF document text
    • https://gowoxavakuf.weebly.com/uploads/1/3/4/7/134702457/f1792254693eb.pdfIn PDF document text
    • http://uose.xyz/zuwamos2l5t.pdfIn PDF document text
    • https://vadezewojig.weebly.com/uploads/1/3/1/3/131379553/rivobuwakapofime.pdfIn PDF document text
    • http://sevoxotedeki.medianewsonline.com/ashrae_fundamentals_handbook_2009_free.pdfIn PDF document text
    • http://rbqjkwklnd.xyz/324368081736024y.pdfIn PDF document text
    • http://consequences.space/65718276630x7u3s.pdfIn PDF document text
    • http://fuzubijixulux.mygamesonline.org/gst_rate_on_transport_of_goods_by_road.pdfIn PDF document text
    • http://jekenufakewe.mypressonline.com/juzafiregul.pdfIn PDF document text
    • http://blockingscenery.com/lightroom_presets_vsco_alternativeeq7b6.pdfIn PDF document text
    • http://jajolamuseku.medianewsonline.com/apple_ipod_shuffle_2nd_generation_battery_replacement.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/miwolezedubujoz/geometry_textbook_answers_chapter_2.pdfIn PDF document text
    • https://s3.amazonaws.com/kizugokofo/16802216563.pdfIn PDF document text
    • https://s3.amazonaws.com/zidenigad/how_to_change_redmi_note_3_charging_port.pdfIn PDF document text
    • https://0ccb9a81-bd3c-41bd-bc79-2352350f0e5e.filesusr.com/ugd/95ea6b_bcd6ec418ba3435d909e112520385e57.pdf?index=trueIn PDF document text
    • https://510b81f6-be4e-4e40-9acf-3f60af495837.filesusr.com/ugd/5f226b_975da8f201a440e0bf249e08873bdd90.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jafujasiwetid/patusukemumijiruf.pdfIn PDF document text
    • https://0c17d2ad-06a2-4efd-9128-26148cac6670.filesusr.com/ugd/44320b_598e4e02f1644481af861fa7f3bbd8e8.pdf?index=trueIn PDF document text
    • https://f45985d3-969e-4a4b-a16b-f92b7c881388.filesusr.com/ugd/20da2d_8eea0a23b5ca4160ab94d55baa96aef0.pdf?index=trueIn 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f637.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF637 5720 bytes
SHA-256: 31078535cb989ae107ad738f3b75d586d5ce419ed2cd93e4d35ccdd6100bda1a
font_01_sfnt_off000109ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109CE 10464 bytes
SHA-256: 22ff44684e805b6470f173882ce4f9c528c0239d86fc1b461883253054188dbb

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