Malicious PDF — malware analysis report

Static analysis result for SHA-256 a29ab5e1868db49b…

MALICIOUS

PDF

71.6 KB Created: 2021-06-07 15:15:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 2c3d3df27ff54448ba2a1c2b0a1b8319 SHA-1: 742b4b09780702cf64cd6e8b3271d5f7371fa444 SHA-256: a29ab5e1868db49b103dcc4c036569680069a8e567a7c120e20ad13a10b0b84c
66 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 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 0.9993

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://chcial.ru/pbw?utm_term=complete+list+of+vmrs+codes PDF link annotation
    • https://meronikam.weebly.com/uploads/1/3/4/7/134705372/lelipoz_nipavixavona.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366014/normal_5ffde08883e5e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404121/normal_606b9c9a4d8cc.pdfIn PDF document text
    • https://pifelitasa.weebly.com/uploads/1/3/5/3/135350032/xomeviwexo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461481/normal_600a3c1bdd676.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381297/normal_60274709f3769.pdfIn PDF document text
    • https://givigifug.weebly.com/uploads/1/3/4/8/134858651/ff97308.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495691/normal_5fe7e7e50e3d8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453115/normal_5fd0dc53a2cdf.pdfIn PDF document text
    • https://sedapelagug.weebly.com/uploads/1/3/4/1/134109100/binesuxenapuz.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4472763/normal_5ffa41d4f022a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381730/normal_603faf4c82e91.pdfIn PDF document text
    • https://wojawiso.weebly.com/uploads/1/3/0/8/130813991/1906133c91d2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405650/normal_5fe751e273119.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gifavipa.pbworks.com/w/file/fetch/144590907/87375986139.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2b416df1-89b1-4a90-8f40-4b263fb558ee/eclipse_phase_titans.pdfIn PDF document text
    • http://nilanom.pbworks.com/f/fetch_decode_execute_cycle_steps_a_level.pdfIn PDF document text
    • http://redelaw.pbworks.com/f/75897428115.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d101d342-d3fa-4947-8db5-a550e4a827ac/american_bully_pocket_size_price_in_punjab.pdfIn PDF document text
    • http://zufogopojut.pbworks.com/w/file/fetch/144509667/wuxesipivanar.pdfIn PDF document text
    • http://veniwusuj.pbworks.com/w/file/fetch/144792891/tipesuforilazuzudokukimej.pdfIn PDF document text
    • http://kunozulig.pbworks.com/f/vixovineribevilasebafilo.pdfIn PDF document text
    • http://sozevupegufi.pbworks.com/w/file/fetch/144604347/principal_centro_ceremonial_de_los_toltecas.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

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_off0000dc02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC02 5056 bytes
SHA-256: 2c8258cc3bb646c047990ce9871ad4f92bff30323f20533b1e7e5d865d31bf59
font_01_sfnt_off0000ed29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED29 10748 bytes
SHA-256: 643cacfc77ae2c4fbfba575d2435033849a6e0a3f0d7899c4860248aba3af723

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