Malicious PDF — malware analysis report

Static analysis result for SHA-256 c467a2f4802c69c6…

MALICIOUS

PDF

63.3 KB Created: 2020-12-14 22:10:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: babb24993a11bcb192ee3b03061230eb SHA-1: 1ddcfec63aad9bec7d202f46c1004d914509f560 SHA-256: c467a2f4802c69c6c3b696d4c80272f1f8e2e2911d3755b8dbee5a51b4ae9538
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 flagged by multiple heuristics as a link farm and by a machine learning classifier as malicious. It contains numerous external links, many hosted on disposable domains, suggesting an attempt to manipulate search engine results or redirect users to malicious content. The ClamAV detection of 'Pdf.Phishing.Trojan' further supports its malicious nature.

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://traffking.ru/aws?utm_term=aurelia+metals+annual+report PDF link annotation
    • https://gejatovuri.weebly.com/uploads/1/3/1/4/131406669/ec797.pdfIn PDF document text
    • https://foxegakadop.weebly.com/uploads/1/3/4/3/134337736/loduvuwopusuf-fixofebozidi-sopud-vesox.pdfIn PDF document text
    • https://rewemekekebaz.weebly.com/uploads/1/3/1/4/131406535/4202832.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457305/normal_5fbdc9fd4bc83.pdfIn PDF document text
    • https://xedaliwim.weebly.com/uploads/1/3/1/4/131454603/a923463a905e.pdfIn PDF document text
    • https://sidusumidiwef.weebly.com/uploads/1/3/4/3/134366372/6086138.pdfIn PDF document text
    • https://gajokemijibefe.weebly.com/uploads/1/3/4/4/134467094/6231615.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447267/normal_5fc0146b1f373.pdfIn PDF document text
    • https://zativazu.weebly.com/uploads/1/3/4/5/134586929/zerevabilozilip_norewezira_nefubuminuw_pijeviwukifuru.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/b60b3bf2-036e-4c5a-968f-e79dc821b094/ccna_routing_and_switching_complete_study_guide_200-125.pdfIn PDF document text
    • https://s3.amazonaws.com/zetubakuz/67467191463.pdfIn PDF document text
    • https://s3.amazonaws.com/pasawexawinogad/android_studio_change_background_color_programmatically.pdfIn PDF document text
    • https://s3.amazonaws.com/wixatax/bioconjugate_techniques.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_off0000b99b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB99B 4956 bytes
SHA-256: 48b819f64130a6656b95ea571034ffdb4aa72951666761167cd9158a179f8f85
font_01_sfnt_off0000ca5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA5B 11240 bytes
SHA-256: c48f1aad0e213accd3cc0922beeac8f8a844b5fb74de002c1ad64708c772fcd7

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