Malicious PDF — malware analysis report

Static analysis result for SHA-256 db9460e0dc62cb42…

MALICIOUS

PDF

79.8 KB Created: 2021-03-30 04:57:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: fb13184c7802d95c8a212cd910312415 SHA-1: ef23001d5620887e9ce43fca65399fc71f080bca SHA-256: db9460e0dc62cb422c4ab89b8736377cceaec859a6b20fedec89bc79cf068d1f
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with one prominent URL leading to a suspicious domain that appears to be part of a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and numerous external links suggest it's designed to redirect users to malicious content.

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://lozipotod.ru/strik?utm_term=volkswagen+car+repair+near+me PDF link annotation
    • https://cdn.sqhk.co/junikesiza/jdvigih/every_outfit_in_assassin_s_creed_origins.pdfIn PDF document text
    • https://cdn.sqhk.co/genizataxom/Igclgdh/20720390369.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4462065/normal_5fcd461e185f9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463824/normal_60302436eb3d5.pdfIn PDF document text
    • https://cdn.sqhk.co/jetuzama/poieHgc/lukojajopirapanonumededik.pdfIn PDF document text
    • https://cdn.sqhk.co/jidelugob/iehZKiB/jobekosutixabazijux.pdfIn PDF document text
    • https://cdn.sqhk.co/luvafuza/hCiiLha/recette_sandwich_poulet_sauce_curry.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4402933/normal_5ff25c2b8624c.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/muvojugejoxip/arere_ekkada_audio_song.pdfIn PDF document text
    • https://s3.amazonaws.com/serogajugomiji/gusopoga.pdfIn PDF document text
    • https://6f4861c6-cdf0-4a5f-ba2d-f9c5e5bfbee6.filesusr.com/ugd/77941b_656c543d048d4ddd919d560ea70b9c95.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/lorifawuvawot/85043443325.pdfIn PDF document text
    • https://s3.amazonaws.com/vinivuxo/82886882114.pdfIn PDF document text
    • https://a0f1d9c0-ea46-4e0e-9383-d87711d3127f.filesusr.com/ugd/1e3fb7_17ee0b9fbcdb4128bd43550350413954.pdf?index=trueIn PDF document text
    • https://94226b1b-8363-4ad6-a779-e61b7b16ff5b.filesusr.com/ugd/b3bc21_46bbd5302fc34bb7be7e326a01c5e99c.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/f1bafc68-d622-4066-b991-18e41f2f358c/what_type_of_intermolecular_force_is_dimethyl_ether.pdfIn PDF document text
    • https://s3.amazonaws.com/remeranexe/how_to_clean_briggs_and_stratton_carburetor_on_riding_lawn_mower.pdfIn PDF document text
    • https://s3.amazonaws.com/fapaga/dumevelokevaxugilev.pdfIn PDF document text
    • https://s3.amazonaws.com/bipovoromoj/interior_design_colleges_texas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/856529e4-f4c0-4e25-9d40-44a7a4c668ac/93609545662.pdfIn PDF document text
    • https://s3.amazonaws.com/tonisefoteka/zarimozowogoma.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_off0000fa17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA17 5376 bytes
SHA-256: a45fc5e34e0fd4141a411d7ad73497a8e191a3cedcc1ca744c8c9cba2ea15bcd
font_01_sfnt_off00010c66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C66 10996 bytes
SHA-256: d20fe3a78e04e6a3f16ac731eaf7a62059d1b28719a81a1caecbd9509cb995f0

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