Malicious PDF — malware analysis report

Static analysis result for SHA-256 92a15c81dc54ce8d…

MALICIOUS

PDF

67.7 KB Created: 2020-11-18 01:59:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 8967e560c884a87edfe19e59e0613845 SHA-1: db732317e8fa2531cddecbac9b2f30aef393658b SHA-256: 92a15c81dc54ce8dc4efc7e27e71cb66b6eff2322f7b4fe0355e83598b12d460
156 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 0.9997

Heuristics 5

  • 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.
  • 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://trafffe.ru/strik?utm_term=acloudguru+aws+solutions+architect+associate PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4366008/normal_5f95d58571604.pdfIn PDF document text
    • https://sotufipepu.weebly.com/uploads/1/3/4/5/134595957/neselimag_pizanopaxu_fijenaluv_paxifuju.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445129/normal_5f9f5b194a40e.pdfIn PDF document text
    • https://wizemeleg.weebly.com/uploads/1/3/4/3/134307012/3536739.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393188/normal_5fa8c8465470d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379237/normal_5f8d53850d1dc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408170/normal_5f99749f3a84e.pdfIn PDF document text
    • https://pigogokeda.weebly.com/uploads/1/3/1/8/131857695/kigipadud.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379231/normal_5fb2528173cd1.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/b28321ed-69aa-43e8-b49a-24ac64751e27/lights_out_full_movie_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cb3e0d07-ae20-477e-842b-5e49f222b8c3/dowojafutitotinoludod.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/921ac7a8-5de8-4f00-871a-c726fb070fae/5898616473.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_off0000ca56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA56 5280 bytes
SHA-256: e89a80f07893993d68a62da3bb5f07d702363f7aefe2d256f9a88f0db14e89ff
font_01_sfnt_off0000dc51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC51 11076 bytes
SHA-256: b03dda48051aa0bccdefe879d72a21a6529a3bfecba9443362d0d43e6bb1ab3b

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