Malicious PDF — malware analysis report

Static analysis result for SHA-256 da8c7be97225c6c8…

MALICIOUS

PDF

68.5 KB Created: 2020-12-03 21:03:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 8844cb992747dfa9e9037cd00ef8362d SHA-1: ba41caac2508c57e12296721c1d214f1152d8191 SHA-256: da8c7be97225c6c88c5957c8866d2a7930444d347f0b7ed6897eaddf9e2fd387
164 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 and presents a deceptive download button. 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-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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://trafffi.ru/123?utm_term=pacific+city+webcam+live PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4369626/normal_5f8f4637d5ebc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474739/normal_5fad97fad1e57.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382778/normal_5fa4825b2dba9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445889/normal_5fbd4f50408d7.pdfIn PDF document text
    • https://bemazinava.weebly.com/uploads/1/3/4/8/134890863/5263006.pdfIn PDF document text
    • https://koxoganonigowup.weebly.com/uploads/1/3/1/4/131408343/606b6.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://static1.squarespace.com/static/5fc0879da3bf4b14aba759f2/t/5fc140b6fa04221c714d9b56/1606500534799/dragon_dice_rules.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b505895a-3f89-41b8-983d-b22216480ae3/87871955305.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/38b48c59-3abe-4621-83bc-2da89f15a21c/90187850227.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e7385dfb-c358-44e5-9c6f-847cfa0e42a0/db2_truncate_table.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9498d0f2-373c-4f99-8531-1ea254907861/jiketazi.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc37ea46b97992eb56c3d7c/t/5fc45ef5e6d49a06bb1e5862/1606704887230/benazokakebigepus.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc4e694085bf90c0e16c363/t/5fc554057acac6192a729111/1606767622537/lucky_day_app_hack.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c472.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC472 4720 bytes
SHA-256: d8a273be52de177e960d5166c6eb6f1f5ce583d9665231dc1988b8fe91987b62
font_01_sfnt_off0000d4a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4A0 10144 bytes
SHA-256: 11a1180b630814b840be54eb43776f8e349fd7efd8bf5c33075093f2d8bb7710
font_02_sfnt_off0000f725.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF725 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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