Malicious PDF — malware analysis report

Static analysis result for SHA-256 ceeb56aee482883f…

MALICIOUS

PDF

76.7 KB Created: 2020-11-19 03:53:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 2102168a9f2bd3d68520935f4eb4b27f SHA-1: 11bda2b64620008bc141d0dcc2635a8750692f92 SHA-256: ceeb56aee482883f2ac3d2a8bdb37eaf211dced04631240888e309cca2983488
196 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. It uses a password-protected-archive lure. 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 0.9998

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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://trafftec.ru/123?utm_term=ans+ul40+phone+manual PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4427519/normal_5fb41c2bd76a8.pdfIn PDF document text
    • https://xawuwotogot.weebly.com/uploads/1/3/2/6/132695388/tijaxekebib-jitamuwafik-vetadixafegi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404313/normal_5fa4f95817756.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376357/normal_5f8cc1a54619d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391302/normal_5faebc99a37f2.pdfIn PDF document text
    • https://zatazonikafude.weebly.com/uploads/1/3/4/3/134340422/zotavusowason-bemuv.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/telasebisu/93701605657.pdfIn PDF document text
    • https://s3.amazonaws.com/bubisifapagefe/31555847108.pdfIn PDF document text
    • https://s3.amazonaws.com/redegelesibif/83613338110.pdfIn PDF document text
    • https://s3.amazonaws.com/mazugezijap/the_guide_summary.pdfIn PDF document text
    • https://s3.amazonaws.com/mijedusovineti/passover_haggadah_maxwell_house.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000df20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF20 4936 bytes
SHA-256: 835cf92a363572e34a3e8504dc5b90a6ea625158ba40beb1ff503c17b856e521
font_01_sfnt_off0000efb2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFB2 12876 bytes
SHA-256: df00355c2d757667122a881a5429e1df088ba49faf10a799e0b9156ed1ad5525
font_02_sfnt_off0001185e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1185E 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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