Malicious PDF — malware analysis report

Static analysis result for SHA-256 85330bd6a55fd14e…

MALICIOUS

PDF

86.4 KB Created: 2021-02-27 22:20:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: e8b2bc95bb8fc4296f71985ad5ea19ba SHA-1: 693066b4d3df6a7a73581656c48e69eb14be11ca SHA-256: 85330bd6a55fd14eccaed1a6e451afbb97dd38777e0c0dcbe4d2472d0f5a2ef9
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable hosting, and is flagged by ML classifiers and ClamAV as malicious. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a deliberate attempt to create a large number of links on low-reputation domains. While no scripts were explicitly extracted, the nature of the embedded URLs suggests a phishing or malware distribution attempt, likely initiated via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://fokemale.ru/wix?keyword=wargame+red+dragon+campaign+guide PDF link annotation
    • http://blog-millionaire.buzz/956866297716l4wz.pdfIn PDF document text
    • http://frukt.space/zumafazavowe0gtjx.pdfIn PDF document text
    • https://cdn.sqhk.co/zovitamojim/zegilhg/60814453134.pdfIn PDF document text
    • http://zekojotewakugag.mypressonline.com/kemogibemenilekejimiwava.pdfIn PDF document text
    • http://navevukosuso.mypressonline.com/74025110586.pdfIn PDF document text
    • http://naturagrush.space/best_rock_n_roll_drum_solosaa0m4.pdfIn PDF document text
    • https://cdn.sqhk.co/jidulopavoji/nOtiajd/48918350142.pdfIn PDF document text
    • http://shoppermarket.online/english_grammar_for_class_3_cbse_syllabusylqt0.pdfIn PDF document text
    • http://gayerkan.com/29380921965vpqdc.pdfIn PDF document text
    • https://cdn.sqhk.co/gofelaxes/dEkLVhh/zig_zag_braids_hairstyles.pdfIn PDF document text
    • http://instapriz24.site/30823408139nvz29.pdfIn PDF document text
    • https://cdn.sqhk.co/pisimebuziz/hrRgibC/gapisa.pdfIn PDF document text
    • http://lozipazom.sportsontheweb.net/lg_ce0168_model_name.pdfIn PDF document text
    • http://zefujixa.mywebcommunity.org/ssr_side_by_side_170.pdfIn PDF document text
    • http://thecabinets.xyz/how_to_adjust_coaster_brake_hubex1xj.pdfIn PDF document text
    • https://luvepuxoworusoj.weebly.com/uploads/1/3/4/6/134660421/973281.pdfIn PDF document text
    • https://cdn.sqhk.co/lazujanaziri/H0iemgj/gravity_falls_characters_fat_guy.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vatezajis.rf.gd/dazigopidiniwuvozux.pdfIn PDF document text
    • http://tezafafowajij.epizy.com/wimujuxesokotadof.pdfIn PDF document text
    • http://fubejubede.rf.gd/dadazumuxefak.pdfIn PDF document text
    • http://vijanemafe.rf.gd/risk_analysis_template_construction.pdfIn PDF document text
    • http://kusegewamuzazod.epizy.com/29986655015.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_off0001170e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1170E 5196 bytes
SHA-256: 7ecd880e5caf1b107b13cba083312ce51678fa36080db334a654eff35ab8a4b6
font_01_sfnt_off000128ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128AE 10356 bytes
SHA-256: 3237413c8e9585f90f5a016566971d6e8cf0598988f747612930ba6c9bcad16f

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