Malicious PDF — malware analysis report

Static analysis result for SHA-256 71f63701377ca296…

MALICIOUS

PDF

85.0 KB Created: 2020-12-28 16:03:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 002e2baf63e557544eb870d69570cfec SHA-1: 703c3fe987012f36b6fe154a8ea02c3e897bb636 SHA-256: 71f63701377ca296e388c1dcb1368a80f52de47deebbaaa6dc2a457d5222da4f
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 0.9998

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://trafficel.ru/strik?utm_term=prison+break+cast+tweener PDF link annotation
    • https://cdn.sqhk.co/tadawatimi/eidlvib/3d_galaxy_map_pro_apk_download.pdfIn PDF document text
    • https://cdn.sqhk.co/xevuvuxene/iMzgdwf/border_patrol_academy_calendar.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471723/normal_5fad2598de5ce.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372960/normal_5f8e5bdbb0ffd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376599/normal_5f9b9e3b74769.pdfIn PDF document text
    • https://jotulamopusojo.weebly.com/uploads/1/3/4/4/134465369/a5778e88.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420238/normal_5fe00d2a9d4db.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465709/normal_5fe6d0a61a90f.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/4cd43e54-9085-442f-880d-83c74246ff6e/runijewilagodopiluludik.pdfIn PDF document text
    • https://s3.amazonaws.com/duzexefemosaxe/84328494005.pdfIn PDF document text
    • https://s3.amazonaws.com/rexogeguxosix/vakifiwowose.pdfIn PDF document text
    • https://s3.amazonaws.com/liguwubore/muzakenumakikabaridumed.pdfIn PDF document text
    • https://s3.amazonaws.com/wexukufedepim/44322283693.pdfIn PDF document text
    • https://s3.amazonaws.com/telasebisu/72644022139.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_off00010d38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D38 5056 bytes
SHA-256: 21aa14007b54a2aec565badd3be9cf3437f1e069c342ff52f96acd7d5a5261e4
font_01_sfnt_off00011e8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E8B 12716 bytes
SHA-256: 820849ea53dde5abd06661ae8c5e4442ba1092bdbb18ebda0d8265e0291c7072

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