Malicious PDF — malware analysis report

Static analysis result for SHA-256 82c94d8a06dc294c…

MALICIOUS

PDF

77.3 KB Created: 2021-02-08 16:50:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 22e1a24aa265d5535007884a0aaa4291 SHA-1: 95340025ef40d12ed1a8b1c2c88dd68b41d99405 SHA-256: 82c94d8a06dc294ce45f47ce2a2b39da4785579ff5d70b367c083ffd7b55265c
126 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a machine learning classifier and ClamAV, indicating malicious intent. It contains numerous embedded URLs, with several pointing to suspicious domains and one specifically identified as a link farm on disposable hosting. The document body, though heavily obfuscated, contains references to 'wild ginseng price per pound' and application metadata, suggesting a lure to a content-related website.

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 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://jottigo.ru/123?utm_term=wild+ginseng+price+per+pound PDF link annotation
    • http://mamunetosi.iblogger.org/nesixor.pdfIn PDF document text
    • http://afracheat7.xyz/54637993922q86bh.pdfIn PDF document text
    • http://silkhfig.bid/exosuit_high_capacity_inventory5m0ph.pdfIn PDF document text
    • http://richteam.site/woturiwiradi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418368/normal_5fd11a98d4eba.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374698/normal_5fdd8bc65bc0e.pdfIn PDF document text
    • http://pannochki-art.com/the_information_age_time_period5m04h.pdfIn PDF document text
    • http://petonopelun.iblogger.org/rasegemofolijebamuwirup.pdfIn PDF document text
    • http://accface.in/bugegidezedizunotakukufwp.pdfIn PDF document text
    • http://teasmall.space/27615421858pdz8i.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470016/normal_6013ed486dc55.pdfIn PDF document text
    • http://zawubitukete.22web.org/62847225122.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
    • http://xumugipetoje.epizy.com/awdhesh_premi_bhojpuri_video_gana_ing.pdfIn PDF document text
    • http://niwuganol.epizy.com/tilenowolidaziza.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e4bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4BB 4844 bytes
SHA-256: b08657d9c1f53517fb15dc8d975eff261d4447655bc131f040bd457bd9fb23c6
font_01_sfnt_off0000f53f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF53F 10472 bytes
SHA-256: 5b172f4cf0b81ec3325189b76f4c7aa422aabe79f57c49eddb959f70008c928e
font_02_sfnt_off000118da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118DA 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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