Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b42f367edb66e21…

MALICIOUS

PDF

83.2 KB Created: 2021-03-20 15:54:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: e092ee6803949e1af7cb221ea924e196 SHA-1: abcdebc6fe98dd1f9938c3eb217b93019d5e23a2 SHA-256: 1b42f367edb66e213d421652d184b24ed0c7cf4199c9a9b4311e098000ab2955
66 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with a high-confidence ML classifier flagging it as malicious. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a pattern of using disposable hosting for a large number of links, suggesting an attempt to manipulate search engine results or redirect users to malicious content. No scripts were extracted, but the presence of many external links points to a phishing or malicious redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://zajinet.ru/wix?keyword=human+luna+and+artemis PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4500001/normal_6048ef3036efe.pdfIn PDF document text
    • https://tifalexax.weebly.com/uploads/1/3/4/4/134471923/2228314.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467564/normal_6022ffabdb787.pdfIn PDF document text
    • https://wajuzetixageg.weebly.com/uploads/1/3/0/9/130969085/822eb1e054413dc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470835/normal_5fd63dd51a6c0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369663/normal_6006bd37562fb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4469831/normal_5fcf9c2b0bf9a.pdfIn PDF document text
    • http://jaditifesan.22web.org/venewiluvodokirekirerezit.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479226/normal_6015cffc3a64b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4500430/normal_5fc69df4f38f5.pdfIn PDF document text
    • http://rumulive.iblogger.org/66110498806.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465259/normal_5fec08c0bc6b4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383679/normal_5fe04b4868575.pdfIn PDF document text
    • https://zusabave.weebly.com/uploads/1/3/1/4/131406295/refuxibuselo.pdfIn PDF document text
    • http://gujufifirisin.22web.org/98789217125.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/1bf345cb-0724-4379-887e-77f20b6bc5c0/kaviruwegetijafa.pdfIn PDF document text
    • http://kirigawegugava.epizy.com/rilenuzeduwateganebomo.pdfIn PDF document text
    • http://misopipe.rf.gd/51424373605.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/98ebc865-c265-427d-b01e-3fcda96fb6f8/75339878448.pdfIn PDF document text
    • http://mugofunuwutav.epizy.com/jifez.pdfIn PDF document text
    • http://nipipaxala.rf.gd/bribe_web_series_episodes.pdfIn PDF document text
    • http://xegefonupekowa.epizy.com/australian_indigenous_health_information.pdfIn PDF document text
    • http://mafolizol.rf.gd/supodajuripedalupupofepax.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4cfb4cea-86df-4ea8-8b70-139a87d686c0/90320935294.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0e08209f-9ef3-4e7c-a40e-b9b7365201d0/percy_jackson_demigod.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f80e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF80E 4236 bytes
SHA-256: 6deea912d84aa5a9366a8a011c34989f8695e031ebdd13e810a291b935ab3e3c
font_01_sfnt_off0001070b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1070B 4932 bytes
SHA-256: 9605fdf380cfadad1f6f1f07da4766a6e21f05959c15db73f0cd0d5276255706
font_02_sfnt_off000117ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117AB 12292 bytes
SHA-256: 5b3ebaa933821b3917a05e31bc7cfcab47de27db31d5a2d2362886352bf7ce91