Malicious PDF — malware analysis report

Static analysis result for SHA-256 12048664aa17bbea…

MALICIOUS

PDF

63.8 KB Created: 2021-02-11 04:59:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: e5c4e4d5d5eb8fcc1eeefc11c87a76b8 SHA-1: 0386b177495b2ad1adbc7d21720e9807656a7463 SHA-256: 12048664aa17bbeaa963ffc574d8e893b500183b7f196b856bbb4cfd8e1f19e6
226 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains a large number of external links, many hosted on disposable domains, indicative of a link farm or SEO manipulation. The 'SE_MFA_LURE' heuristic suggests the document is designed to trick users into providing credentials or MFA codes. ClamAV detection and ML classification further support its malicious nature, likely as a phishing or credential harvesting tool.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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.
  • MFA / one-time-code harvesting lure high SE_MFA_LURE
    Document asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
  • 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://leonvi.ru/123?utm_term=rogers+county+jail+inmates PDF link annotation
    • https://cdn.sqhk.co/vemunaxudug/ohipghj/nexuvutiwax.pdfIn PDF document text
    • http://jafalule.22web.org/59822133897.pdfIn PDF document text
    • https://dunabosugetagek.weebly.com/uploads/1/3/4/6/134601841/4572483.pdfIn PDF document text
    • https://palobakuk.weebly.com/uploads/1/3/4/5/134523632/960939.pdfIn PDF document text
    • http://gikadoketu.iblogger.org/maaveeran_audio_songs_free_in_tamil.pdfIn PDF document text
    • https://cdn.sqhk.co/kenipafitu/aRw4Bie/28416696920.pdfIn PDF document text
    • http://mibosaputir.22web.org/92809608714.pdfIn PDF document text
    • https://mosezusimoz.weebly.com/uploads/1/3/1/6/131637881/pixada_zofak_guwiviji_kotikapilofit.pdfIn PDF document text
    • https://lufiwusogak.weebly.com/uploads/1/3/4/3/134319395/96102e9cfa9.pdfIn PDF document text
    • https://panusefebile.weebly.com/uploads/1/3/5/3/135331690/vomekejigulov.pdfIn PDF document text
    • https://cdn.sqhk.co/pijavagoke/OdjhXji/69308189557.pdfIn PDF document text
    • http://zikifogomi.22web.org/susewunoterutilupazip.pdfIn PDF document text
    • http://jokebixa.22web.org/25334835242.pdfIn PDF document text
    • https://cdn.sqhk.co/sovokeduseb/hdhbLhe/zinexamaxaneboliju.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nomapalugaji.epizy.com/birla_carbon_annual_report_2019.pdfIn PDF document text
    • http://nodezolejew.epizy.com/83605899543.pdfIn PDF document text
    • http://rowisumemosil.rf.gd/hnh_nn_background_template_powerpoint_p.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_off0000bec7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBEC7 5304 bytes
SHA-256: 0d80d5634e9af4088039f99a04430812c77aabc7ffa6c46cfb5ea661e40858c3
font_01_sfnt_off0000d0d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0D6 10056 bytes
SHA-256: 60cd43f78d7b1fdc79225daf8ccf79170d5dfe496fb6bde64da2eb589ca3a400

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