Malicious PDF — malware analysis report

Static analysis result for SHA-256 82045c76906b3694…

MALICIOUS

PDF

74.2 KB Created: 2021-03-01 21:37:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 058dd9136c860d1714e2e45f0bc6ee81 SHA-1: d5dcfb5eea725fc3a6541e882a8ad9b27c53d6de SHA-256: 82045c76906b36948735908938c8d5c267f1f4e7f776112c6a2fd7a9a42434b2
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to disposable domains, a common tactic for phishing or distributing malware. Heuristics indicate it functions as a link farm, with one URL specifically targeting a search term. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery via these external links.

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://jumiwimov.ru/aws?utm_term=all+souls+cemetery+chardon+ohio PDF link annotation
    • http://sovefureze.iblogger.org/how_to_lie_with_statistics_chapter_8_summary.pdfIn PDF document text
    • http://nerroba.info/how_to_use_side_fire_box_on_char_grillerpzi2g.pdfIn PDF document text
    • http://xoroketogejuxe.mywebcommunity.org/xirazovixugorutor.pdfIn PDF document text
    • http://kogemotuju.getenjoyment.net/fuwewigudunefipebito.pdfIn PDF document text
    • http://kijofizovurisos.medianewsonline.com/79905582668.pdfIn PDF document text
    • http://xofofumireke.mypressonline.com/7123872497.pdfIn PDF document text
    • http://xovekofetovo.66ghz.com/2_player_car_games_pc.pdfIn PDF document text
    • http://toleritikujomuj.22web.org/78174099609.pdfIn PDF document text
    • http://fejukoturig.medianewsonline.com/33456364602.pdfIn PDF document text
    • http://jopagozopive.medianewsonline.com/4276703018.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tudibakigar.epizy.com/the_giver_chapter_10-13_summary.pdfIn PDF document text
    • http://jabaxuzadowepep.rf.gd/wuvobinun.pdfIn PDF document text
    • http://puxetixunelotaz.epizy.com/activesheet_exportasfixedformat_invalid_procedure_call.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_off0000e0af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0AF 5268 bytes
SHA-256: ba85f19d8d75c4b437bdf73922a4e5351c75c8e09721bf4ecd38a24897b4b341
font_01_sfnt_off0000f274.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF274 11628 bytes
SHA-256: 553dd6d0c8b6855b7bdc5aaf0ea2f600e5643ccca733b80ef16b2a540356c77a

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