Malicious PDF — malware analysis report

Static analysis result for SHA-256 8da7dbb94a942487…

MALICIOUS

PDF

33.9 KB Created: 2020-11-06 06:23:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 4d81f54f7c932c4826709e54a07b8ed5 SHA-1: 11a3e28a4f117bf8472d75e3fb64df606e09483e SHA-256: 8da7dbb94a942487400c6615dd04794d97b91d744c839cd952510bffcec83903
66 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF document contains numerous embedded URLs, many of which point to disposable domains, suggesting a link farm or phishing attempt. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' specifically flags this behavior. The ML classifier also strongly indicates maliciousness. The embedded URLs likely serve as a lure to redirect users to malicious sites, potentially for credential harvesting or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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://traffset.ru/123?keyword=coleman+above+ground+pool+manual PDF link annotation
    • https://nikitepiwaligu.weebly.com/uploads/1/3/4/6/134647260/caa68.pdfIn PDF document text
    • https://pasuliwipo.weebly.com/uploads/1/3/1/4/131452824/dofasogir.pdfIn PDF document text
    • https://soxixafefude.weebly.com/uploads/1/3/4/4/134434462/wexikujelexigabep.pdfIn PDF document text
    • https://tovozilulu.weebly.com/uploads/1/3/0/8/130873983/neluxerodixenawesun.pdfIn PDF document text
    • https://fidegobopoj.weebly.com/uploads/1/3/2/8/132815019/3460351.pdfIn PDF document text
    • https://jatorogerujew.weebly.com/uploads/1/3/2/7/132710569/sijuwoxujupid.pdfIn PDF document text
    • https://gemaxudemaxepeb.weebly.com/uploads/1/3/1/0/131070646/ganofajelubasuj.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/vapelurowar/biometria_fetal_ecografia.pdfIn PDF document text
    • https://s3.amazonaws.com/penale/jaxaziwejibusiketilewo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/00cfce80-1534-4df8-ac61-8e969bd9a3fa/kitotetaxewa.pdfIn PDF document text
    • https://s3.amazonaws.com/solonebosop/jacquelyn_newell_image.pdfIn PDF document text
    • https://s3.amazonaws.com/godewumazek/gmod_prop_hunt_play_for_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/5670/8770/files/the_feud_between_capulets_and_montagues.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_off000045fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x45FE 5208 bytes
SHA-256: 07339e2c4cd700b34586add58a4e4b4781868ebaf09b3bb4a5c59dfaf7c5337c
font_01_sfnt_off00005797.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5797 10460 bytes
SHA-256: 327e6f9c1d91ca276255d64925d75012545247ce5d5aa6f0639d04cac135f7df

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