Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a896680bb532269…

MALICIOUS

PDF

74.2 KB Created: 2021-02-14 23:01:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: d8b3bbc3bd3d16986c7e18843d10f1b6 SHA-1: b6578a151d3c3087d4bbe994b8b289123af55f11 SHA-256: 6a896680bb532269f3a68c09ae372c1da5b2921a3b27ad73e653f41b00c9cb87
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://leonvi.ru/wix?keyword=solving+equations+fun+worksheet PDF link annotation
    • https://nigoriwidoke.weebly.com/uploads/1/3/5/2/135296580/lodojazanuma.pdfIn PDF document text
    • https://ludefojixik.weebly.com/uploads/1/3/5/3/135347049/1357560.pdfIn PDF document text
    • https://ragadavifomo.weebly.com/uploads/1/3/5/3/135306528/50a6079e.pdfIn PDF document text
    • https://rodugetimevo.weebly.com/uploads/1/3/1/4/131407281/7ed53c1dc4379b.pdfIn PDF document text
    • http://meetchat.space/30734436614o2s74.pdfIn PDF document text
    • https://gumewutudeg.weebly.com/uploads/1/3/0/8/130813982/7485843.pdfIn PDF document text
    • https://lenopeseku.weebly.com/uploads/1/3/4/0/134040497/kisiwodi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366664/normal_600f243d8b55e.pdfIn PDF document text
    • https://jopazidavasuzu.weebly.com/uploads/1/3/2/6/132681438/wetodazox-mulukikowesoxer.pdfIn PDF document text
    • https://fugomunufu.weebly.com/uploads/1/3/4/5/134586131/kofogimetuvube.pdfIn PDF document text
    • https://gegadibiliwo.weebly.com/uploads/1/3/1/8/131871883/efb1a3232848.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415739/normal_5fcd661da6cfe.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://malinaliwul.epizy.com/beginner_guitar_chords_sheet.pdfIn PDF document text
    • http://gugujis.epizy.com/total_war_eastern_roman_empire_guide.pdfIn PDF document text
    • http://wupatime.epizy.com/funny_answering_machine_messages_for_cell_phones.pdfIn PDF document text
    • http://gifimedirawi.epizy.com/jimebon.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_off0000e558.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE558 5472 bytes
SHA-256: a64ab7b0f54b94b1c9550dfd03028578fb2c59f904212fca57b14cd4ef5e8612
font_01_sfnt_off0000f803.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF803 10664 bytes
SHA-256: aad8577373021b88b4b0685fb23baba7f69bc76c15faf2b9eff9a82cb656ac49

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