Malicious PDF — malware analysis report

Static analysis result for SHA-256 20a47ce6b9256eb1…

MALICIOUS

PDF

90.8 KB Created: 2021-04-26 00:09:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: ba0f45fda1e38e89187c0237f0813929 SHA-1: bb0e818e500bc99dda815c8519b3f9e234a567b7 SHA-256: 20a47ce6b9256eb1fe65d6092f0003bb90cceba8168e0a988a920266a4702247
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains a large number of external links, suggesting it functions as a link farm designed to redirect users to potentially malicious websites. The presence of embedded URLs and the overall structure strongly suggest an attempt to exploit users through deceptive redirection.

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://resalured.ru/strik?utm_term=the+hunger+games+books+hardback PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4391605/normal_600b9d31a0bb8.pdfIn PDF document text
    • http://nevinidonet.mywebcommunity.org/gosepemate.pdfIn PDF document text
    • https://nitevugumosu.weebly.com/uploads/1/3/4/5/134526644/853fc2b68c4635.pdfIn PDF document text
    • https://mulokigapasol.weebly.com/uploads/1/3/1/0/131070847/mafagasujikunug.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481170/normal_5fd67bf923155.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459805/normal_6053ab7c66efe.pdfIn PDF document text
    • https://taburexil.weebly.com/uploads/1/3/4/3/134374137/3805620.pdfIn PDF document text
    • http://nomenowunesazoz.scienceontheweb.net/cattle_production_in_zimbabwe.pdfIn PDF document text
    • https://gowigejovijori.weebly.com/uploads/1/3/0/7/130740297/lisegij_texevazizoso_dotaxogezaj.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4428061/normal_5ffa796f36595.pdfIn PDF document text
    • https://nafejodibema.weebly.com/uploads/1/3/4/3/134318188/637b0799e727.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450631/normal_5fdd34118039c.pdfIn PDF document text
    • https://kogewovedof.weebly.com/uploads/1/3/4/3/134339257/9f7c85c81b76f35.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4423195/normal_6006e3872e1e9.pdfIn PDF document text
    • https://vijapuloxo.weebly.com/uploads/1/3/0/7/130775263/witawojeni.pdfIn PDF document text
    • https://xuloxaxofe.weebly.com/uploads/1/3/5/2/135294954/jivujapawelelaz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375891/normal_5fe9f2a8e2cca.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://soranodabiwegi.myartsonline.com/bounded_rationality_and_industrial_organization.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_off00012573.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12573 5476 bytes
SHA-256: 0e8d14e0b256f483eb5cdbef69600f36208545f4a780ccb9857f4e980349cb19
font_01_sfnt_off000137e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x137E4 11316 bytes
SHA-256: ef6818f8f5bd2911394b26e652141c8d6a1c8a6ba08a8301be2755024ddd567f

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