Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2f8c68150c8c6b0…

MALICIOUS

PDF

70.1 KB Created: 2020-12-15 12:40:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 94e1373ef7279092427ebb54d30b01a2 SHA-1: 591b274754dc0f1aeac6ba5b88a05fb7ac911469 SHA-256: d2f8c68150c8c6b0c124713daba439f9cb61e2c47657a8c3e040e0f1681b65af
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, with many pointing to Weebly-hosted PDFs. This behavior is indicative of a link farm or a phishing attempt to direct users to malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or SEO spam.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://traffnew.ru/wb?keyword=brazilian%20blowout%20formaldehyde%202017 PDF link annotation
    • https://zuxibonidape.weebly.com/uploads/1/3/4/8/134889984/7766104.pdfIn PDF document text
    • https://bidoruwo.weebly.com/uploads/1/3/4/6/134651737/c8c945a5.pdfIn PDF document text
    • https://xixemoxutosiseg.weebly.com/uploads/1/3/4/4/134473276/levezeku.pdfIn PDF document text
    • https://paxesejok.weebly.com/uploads/1/3/4/3/134348383/2844f2611da22.pdfIn PDF document text
    • https://rifelejoxew.weebly.com/uploads/1/3/4/3/134330737/bbe250aa3f1f58.pdfIn PDF document text
    • https://banafazag.weebly.com/uploads/1/3/4/3/134325205/6554990.pdfIn PDF document text
    • https://nozirokopen.weebly.com/uploads/1/3/4/6/134613575/b69c6c3693be.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/tunenijexe/astral_pipe_price_list_2019.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aed02655-f236-4768-9f2d-386270a27c8e/jutubejapesexewuzaridu.pdfIn PDF document text
    • https://s3.amazonaws.com/kizugokofo/payday_2_shackleton_auction_stealth_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/xebuvuwov/in_native_american_families_sociology.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8903e88e-3621-46b2-a9a6-08a0891a1a9f/vovemenotevujivurevagogu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a189f71e-eb4f-4dd6-97cf-c3e1430c8b96/tickets_for_hamilton_in_baltimore.pdfIn PDF document text
    • https://s3.amazonaws.com/jamuluvuvava/46385214566.pdfIn PDF document text
    • https://s3.amazonaws.com/gurupixabogivaz/73990230612.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0c110024-f2bc-41d8-9775-40e1a6cf91a8/vegofobaterapag.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_off0000d543.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD543 5808 bytes
SHA-256: 3b0d24453b0a7f2683b63d3e7cb22bec33ec1dfe38d5c944abd7f9defbdc3b24
font_01_sfnt_off0000e90b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE90B 10092 bytes
SHA-256: fd6e22a576c9372c6c89b0b919be7da39064923845fdd46be989287a78796727

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