Malicious PDF — malware analysis report

Static analysis result for SHA-256 30fbdd2acf3b7e5f…

MALICIOUS

PDF

77.9 KB Created: 2021-05-01 13:21:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 2ad0df1ebf3f4701f9255fa50db919dc SHA-1: 8aa09a40ea052438f4f09a9fdfd8a78ede70d278 SHA-256: 30fbdd2acf3b7e5f8295368103036f819ccd1665e3a6180feebb4d9fde3670a0
186 Risk Score

Malware Insights

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

The PDF document was identified as malicious by ClamAV and an ML classifier, and it contains a significant number of external links, many hosted on disposable domains. This indicates a link farm designed to distribute malicious content or phish users. Although no scripts were explicitly extracted, the presence of numerous external URIs suggests an attempt to redirect the user to a compromised or malicious site, likely as part of a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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 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.
  • 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://zajinet.ru/strik?utm_term=all+marketers+are+liars+seth+godin+summary PDF link annotation
    • http://volanorirabu.22web.org/how_to_use_braun_epilator_9_on_face.pdfIn PDF document text
    • http://zonisazi.22web.org/92055883281.pdfIn PDF document text
    • https://tunutepefa.weebly.com/uploads/1/3/1/4/131453603/1044487.pdfIn PDF document text
    • https://cdn.sqhk.co/befozaxulot/igDkifa/mujigatubo.pdfIn PDF document text
    • http://dijobojanojo.22web.org/maths_textbook_class_12.pdfIn PDF document text
    • https://cdn.sqhk.co/jasamomedam/GbRjaZe/61175593260.pdfIn PDF document text
    • http://s7hmus.org/zowiwurolepevafunemev2zzz1.pdfIn PDF document text
    • https://cdn.sqhk.co/godereliku/gfHAqX7/lotojutusafubofosinoreno.pdfIn PDF document text
    • https://cdn.sqhk.co/dokiladigana/hdfgcgg/hdfc_mutual_fund_sip_redemption_form.pdfIn PDF document text
    • https://kapuwibipu.weebly.com/uploads/1/3/0/9/130969563/9b3b44bad0.pdfIn PDF document text
    • http://visionnew.xyz/fishing_warrior_online_apkroutt.pdfIn PDF document text
    • https://cdn.sqhk.co/sotatixorawi/idjg5SP/hotels_with_water_parks_in_sandusky_ohio.pdfIn PDF document text
    • https://cdn.sqhk.co/bevoroxur/3xYjeYK/pinavus.pdfIn PDF document text
    • http://latuha.com/465177791380l8b8.pdfIn PDF document text
    • http://tojepegavatevol.iblogger.org/teachers_day_speech_in_telugu.pdfIn PDF document text
    • https://cdn.sqhk.co/famagafe/rIiigcg/vutinubekeduwufufujodap.pdfIn PDF document text
    • https://cdn.sqhk.co/berazanoga/fhd48jD/64621966099.pdfIn PDF document text
    • http://complerbnp.com/15652701515j3s33.pdfIn PDF document text
    • https://cdn.sqhk.co/bipozipo/j8ggeia/31743388804.pdfIn PDF document text
    • http://naworigexoz.iblogger.org/journal_of_endocrine_society_case_report.pdfIn PDF document text
    • https://cdn.sqhk.co/nunagike/QeEOice/damage_report_template_free.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://titomozuluvexov.epizy.com/avanza_g_2014_manual_jakarta.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_off0000f20c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF20C 5396 bytes
SHA-256: 9b165534943221b047bb50ad623153ccb740d62cc3f5a33e81f392b4fcdb92b7
font_01_sfnt_off0001043d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1043D 11216 bytes
SHA-256: 9427c756299dde0a64b16978d9f195e572e5128a378438d83427ed10e4a9f4c9

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