Malicious PDF — malware analysis report

Static analysis result for SHA-256 de15d9659bebabb5…

MALICIOUS

PDF

68.5 KB Created: 2020-11-24 11:39:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 557d185020c3329ae3afe6dcf8c065d1 SHA-1: 9699800b183096a4d25d7f66e5a6c1dab4966ba0 SHA-256: de15d9659bebabb5fcd93fdc5dcd352a32def27dc8c1862781696fd6a3056ab9
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://traffnew.ru/123?utm_term=sekiro+pre+order+bonus+gamestop PDF link annotation
    • https://puxugewukuniw.weebly.com/uploads/1/3/4/4/134492634/2999856.pdfIn PDF document text
    • https://wetejitaxazis.weebly.com/uploads/1/3/4/3/134306742/powapuniki_xatojadajuko.pdfIn PDF document text
    • https://buxijoxusezo.weebly.com/uploads/1/3/1/4/131483018/925872.pdfIn PDF document text
    • https://guratebiliwabop.weebly.com/uploads/1/3/2/6/132682790/dofusajopalapa.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/wuniku/bullet_town_by_blue_wiz.pdfIn PDF document text
    • https://s3.amazonaws.com/juzinaramip/game_anime_android_mod_apk_offline.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/956d4d77-222c-4cb6-9437-e9c972dd8b01/rojolepofovedobadibom.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1275b475-d9a4-4cb3-b58a-e85d02f14d12/jebovutesi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b4d41c5f-ee49-4160-aeb1-f00bdd1d3741/exercicios_sobre_os_povos_pr_colomb.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a39d357c-6b7c-4eeb-ab8a-227a8a69fef3/37691844259.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/35a32bcc-a06a-4800-9c9a-8fc94061ac27/dj_army_bass_time_mp3_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/79045440-0584-4742-9a85-edee0495496f/rewiruwulere.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e073c3a6-b6e4-4065-81a0-79da1c1b460f/ludadanulibinilofa.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_off0000ce12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE12 5552 bytes
SHA-256: 752b5da77e31a4c87faa7eb2bd462e8c33ebd64c2c41fa3696a9cedec8d175d0
font_01_sfnt_off0000e0db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0DB 10664 bytes
SHA-256: c5433ded2eb1b8f3ee4d4765bf8b56b515b84a2f4726bba241ba9427775ab638

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