Malicious PDF — malware analysis report

Static analysis result for SHA-256 eda024dc6319eb75…

MALICIOUS

PDF

68.4 KB Created: 2021-01-11 03:41:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: d11f8a528cbe445b49e034df17c26feb SHA-1: 42083229bf68d44106dd213c721bd1331d702567 SHA-256: eda024dc6319eb75e14ac62015284321d25a3ba4077524b1f3bac5a45ddd0ecb
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document was flagged by multiple heuristics, including a critical ClamAV detection for Pdf.Phishing.Trojan. The presence of numerous embedded URLs, many pointing to disposable hosting and link farms, strongly suggests a phishing or malware distribution attempt. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of malicious intent, likely leading to further compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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=the+frustration+game+online PDF link annotation
    • https://site-1171435.mozfiles.com/files/1171435/41100336095.pdfIn PDF document text
    • https://wukelefitifaka.weebly.com/uploads/1/3/4/8/134882985/5382049.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366309/normal_5fe54c5a8f262.pdfIn PDF document text
    • https://site-1171722.mozfiles.com/files/1171722/suvilen.pdfIn PDF document text
    • https://site-1177421.mozfiles.com/files/1177421/nufagasotabusogub.pdfIn PDF document text
    • https://dudazesulibo.weebly.com/uploads/1/3/4/6/134639231/noruvefuvop.pdfIn PDF document text
    • https://magozenidudib.weebly.com/uploads/1/3/4/7/134711122/f849e8ea.pdfIn PDF document text
    • https://cdn.sqhk.co/manowipete/hiPvLhb/history_of_thanksgiving.pdfIn PDF document text
    • https://site-1166752.mozfiles.com/files/1166752/keloloxad.pdfIn PDF document text
    • https://site-1177775.mozfiles.com/files/1177775/chicken_crossing_the_road_game.pdfIn PDF document text
    • https://cdn.sqhk.co/gobuwovuv/hjjb8jj/batteries_plus_phone_repair_warranty.pdfIn PDF document text
    • https://kuvetofuba.weebly.com/uploads/1/3/4/6/134607492/wililukona-loxunegasidid.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/muvevanepen/9004196963.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_off0000cfae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFAE 5132 bytes
SHA-256: 1baea8fe54fed3a7ea639e1b8e5dca6114fcfce42087d03ab4ea74363e606832
font_01_sfnt_off0000e0fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0FC 10580 bytes
SHA-256: 574db37f557884a032b64068b423676598f48a66de91d692ca2a2411fac85cf2

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