Malicious PDF — malware analysis report

Static analysis result for SHA-256 98722ed089f3c205…

MALICIOUS

PDF

73.8 KB Created: 2021-01-23 13:23:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 25ee6677144fd1a9af42c624753d562b SHA-1: 01422cfc3c7768ea23cc171457548b57e06b5c69 SHA-256: 98722ed089f3c205f6766b1fd43fe75c30938d8ee3c43141e99dfce149efbcb6
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-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.
  • 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://traffine.ru/aws?utm_term=python+flask+website+templates PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4370294/normal_5febee4468bed.pdfIn PDF document text
    • https://site-1180710.mozfiles.com/files/1180710/dead_road_city_lodge.pdfIn PDF document text
    • https://site-1178349.mozfiles.com/files/1178349/8666415319.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415518/normal_5fff9762e7221.pdfIn PDF document text
    • https://xisuviwilizej.weebly.com/uploads/1/3/4/3/134320176/7807391.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369495/normal_5ffb0d273d9b8.pdfIn PDF document text
    • https://site-1176369.mozfiles.com/files/1176369/napa_auto_parts_appleton_wisconsin.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485591/normal_5ffc9bc98a899.pdfIn PDF document text
    • https://site-1167986.mozfiles.com/files/1167986/the_archers_bbc_soap_opera.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4479923/normal_5fcd72a0843ce.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4427077/normal_5fe38152b2822.pdfIn PDF document text
    • https://site-1177386.mozfiles.com/files/1177386/pokemon_card_game_for_android.pdfIn PDF document text
    • https://site-1171454.mozfiles.com/files/1171454/71409794488.pdfIn PDF document text
    • https://zegosonov.weebly.com/uploads/1/3/4/1/134109065/zifuvajiweganopikof.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446029/normal_5fde1edc7860b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4473903/normal_5ff49dacc306d.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/vifusupegiza/mupiximavusolisetobisebeb.pdfIn PDF document text
    • https://s3.amazonaws.com/niporofez/sugurivamefo.pdfIn PDF document text
    • https://s3.amazonaws.com/xufujofaleki/gukexutotime.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_off0000e090.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE090 5444 bytes
SHA-256: 5f19e6e39b46243bf010bd8d6daf0b9bfa0e0738537912e884e1640f411169c7
font_01_sfnt_off0000f30c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF30C 11532 bytes
SHA-256: db8fb92c9757831fa64289274273bf5767dc6dea6a10d7be9283eb1a85de8653

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