Malicious PDF — malware analysis report

Static analysis result for SHA-256 15e469d75a9ae6a1…

MALICIOUS

PDF

72.3 KB Created: 2020-12-18 19:28:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: 71aa7ba6f11e1929a5afb74bfcc16e01 SHA-1: c3f5dc245a141602679c16220e3dff06100c6522 SHA-256: 15e469d75a9ae6a1a92044aea70354b981d2b3469be8d9337bb6e27861de03c4
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, a common tactic for phishing or directing users to malicious sites. The ML classifier and ClamAV detection strongly indicate malicious intent. The presence of embedded URLs and the PDF_SEO_LINK_FARM heuristic suggest the document is part of a link farm designed to distribute malware or phish for credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://trafficel.ru/strik?utm_term=gardner%2527s+art+through+the+ages+pdf PDF link annotation
    • https://waruzakelejabu.weebly.com/uploads/1/3/4/6/134600446/derudafejasu.pdfIn PDF document text
    • https://wefopizek.weebly.com/uploads/1/3/4/8/134849363/mutekofajulad_wuzixunofiveda_zunujed_vebefagip.pdfIn PDF document text
    • https://nulosomeka.weebly.com/uploads/1/3/4/6/134605351/nasekozoz.pdfIn PDF document text
    • https://zizuralozirufu.weebly.com/uploads/1/3/1/4/131483034/murezumavul.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416495/normal_5f968fad62a8f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368979/normal_5f87d3dfabf93.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407983/normal_5fcaf3771a1f6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368977/normal_5f8c8c61eea34.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/469ab746-9940-45fd-991f-d154c8396a41/zoxukuvosapir.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d76bfc91-526d-4be9-944f-d1ed366fca4c/walmart_grocery_coupon_codes_2020.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/504e5f24-fadc-4592-bbb6-5074b2d32452/sikun.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/72cd7385-2aec-4c52-8d84-df54c12d2632/janilajupak.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/50ac4c37-e6a5-4441-978a-5f517c1380c4/xotazosejevesaram.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d32a1640-d62c-40f7-b80f-e60dceb1f863/46735671955.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/73c4baef-8d03-4e7b-88bd-80eab194753b/6128986964.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_off0000df62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF62 5336 bytes
SHA-256: 71a31d051570e34ee78c4d2749b9178301f446f8ade1480a3623a511dcc29e43
font_01_sfnt_off0000f18f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF18F 10200 bytes
SHA-256: 8320e199e77cfd19559653de9fba6bde49dbed837341e8854f4d527df88dc229

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