Malicious PDF — malware analysis report

Static analysis result for SHA-256 d6473acf67563d20…

MALICIOUS

PDF

68.1 KB Created: 2020-11-19 02:01:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 35173fe05957ae47f9db9ecd63c4e4b8 SHA-1: 148b09415634144e78aebc67230f16b230404ff7 SHA-256: d6473acf67563d2018320e792f4952c11629ad25d6a2af8de2bb06e1c2177d02
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://trafficel.ru/123?utm_term=periapt+of+wound+closure+critical+role PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4479470/normal_5fb2e7fa24a3e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374535/normal_5f8febb817701.pdfIn PDF document text
    • https://lolijejolo.weebly.com/uploads/1/3/4/4/134442146/pajazan_nolabareguk_lapobimegedo_vewinamadivo.pdfIn PDF document text
    • https://doleroxewaforud.weebly.com/uploads/1/3/4/3/134322791/8902188.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/8d85a123-dbf9-4cd6-85a2-72d299960bba/elisha_and_the_angel_army.pdfIn PDF document text
    • https://s3.amazonaws.com/rimepusox/zizuwokogagameviwuradava.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/34ea0579-bbb1-4a5a-9bfa-a18e0f566d38/zitilirixujozoxegonadifu.pdfIn PDF document text
    • https://s3.amazonaws.com/vaxebisapesi/fubefevatiwadowaj.pdfIn PDF document text
    • https://s3.amazonaws.com/fajixe/jadoxifazisubibawetar.pdfIn PDF document text
    • https://s3.amazonaws.com/gulapore/44353501747.pdfIn PDF document text
    • https://s3.amazonaws.com/zozuxukoxo/diabetic_ulcer_guidelines.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/de30ee76-c244-4a13-843e-b9864d34dfdd/21222799508.pdfIn PDF document text
    • https://s3.amazonaws.com/kopisigapub/kipamizixamotakik.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_off0000cca1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCA1 5240 bytes
SHA-256: 3c7a5f75ef645a959a9616cb9707d9f0c6a6439bcd5de3e46e29bf1f4cb6a99c
font_01_sfnt_off0000de9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE9C 10884 bytes
SHA-256: 09902be3dbe99e79d7f8643a33f93d59fee6012bffada8b0c3617861704d4278

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