Malicious PDF — malware analysis report

Static analysis result for SHA-256 afb34c97c1df5566…

MALICIOUS

PDF

74.3 KB Created: 2021-04-07 17:51:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 07ed88fa243b16e62cf7b07ede71d006 SHA-1: dfe22e240d3afb8e98fb7330108e5a71b6ca7eef SHA-256: afb34c97c1df5566c360d07ff164f20a3ae00a69d7b923fac71f07a3f262a5e0
186 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 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 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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://pelibifir.ru/123?utm_term=nist+os+hardening+guidelines PDF link annotation
    • https://cdn.sqhk.co/xavipinav/gVtwgdo/batteries_plus_near_me.pdfIn PDF document text
    • https://cdn.sqhk.co/vezukefuza/3ghgcjh/smart_goals_worksheet_example.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366365/normal_603b15c88eebb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387928/normal_6027825f89b9a.pdfIn PDF document text
    • https://luwigemo.weebly.com/uploads/1/3/4/5/134597726/xeliku_mixipi_pedusevagomizo_xejot.pdfIn PDF document text
    • https://jafusakivamo.weebly.com/uploads/1/3/0/7/130739280/3210875.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385011/normal_606ce90769ee7.pdfIn PDF document text
    • http://lajulufubugo.22web.org/67144349464.pdfIn PDF document text
    • http://sebekeruxa.iblogger.org/segonajizerofopejutisaw.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4378604/normal_5ffe9f10259c1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://35548484-ce42-4b18-9d9d-834326683263.filesusr.com/ugd/a221b6_f535e3105a6e41cebba33fd4e6c0cd5f.pdf?index=trueIn PDF document text
    • https://8f6f9f04-f977-4239-955d-f6aecf2dd879.filesusr.com/ugd/81cd61_f2c35df3fc4341a3aee8d572c7906498.pdf?index=trueIn PDF document text
    • https://4b523d79-2bc6-404f-8e52-0acae4d2cb03.filesusr.com/ugd/fe1b41_4158885ccba947819a169c159bb84743.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/garorowa/cunto_cuesta_una_prueba_de_adn_durante_el_embarazo.pdfIn PDF document text
    • https://s3.amazonaws.com/lefemijip/33492337016.pdfIn PDF document text
    • http://fafumemoponan.rf.gd/what_words_start_with_the_prefix_graph.pdfIn PDF document text
    • https://d99c26cc-8c68-456d-a039-1a26994c8d26.filesusr.com/ugd/105a8c_5e42d224e9d949db804e3dd2c473f3dc.pdf?index=trueIn PDF document text
    • https://62abf401-5fc9-4991-ac00-cb6a0c8cf8ec.filesusr.com/ugd/e4ff69_645a02c2e1b740c5a52996a27de0ea70.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/lorifawuvawot/sujexado.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_off0000e5c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5C2 5056 bytes
SHA-256: 17781400eb0da47a998aa67bf83361c30ed2f006e57ae857b04fe1a71798fcd7
font_01_sfnt_off0000f6f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6F0 11056 bytes
SHA-256: abfe9785c937e2399290d0e50150aaadf0af295b3d38c3998628b3d95dcd8e39

Open this report in the interactive analyzer, or submit your own file for analysis.