Malicious PDF — malware analysis report

Static analysis result for SHA-256 e717a2226bf993c2…

MALICIOUS

PDF

74.9 KB Created: 2021-01-16 06:11:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 8d7230a48b08d9fc38c6880246c3fb87 SHA-1: ae5ed8901c06215f74b9131c3bae8ae9c35b6de9 SHA-256: e717a2226bf993c24307a279f418f3b16ac0b7c7a238160c8e73e096e9ce7fdb
126 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains numerous external URLs, with one specifically identified as a link farm hosted on disposable domains, suggesting a phishing or malware distribution scheme. Although no scripts were explicitly extracted, the PDF structure and the presence of embedded URLs point towards an attempt to redirect users to malicious content.

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://trafficel.ru/wb?keyword=hollywood%20u%20rising%20stars PDF link annotation
    • https://site-1174988.mozfiles.com/files/1174988/77017970906.pdfIn PDF document text
    • https://site-1175676.mozfiles.com/files/1175676/bearded_butcher_deer_skinning.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413969/normal_5fad854913202.pdfIn PDF document text
    • https://site-1181123.mozfiles.com/files/1181123/bebojuka.pdfIn PDF document text
    • https://site-1178527.mozfiles.com/files/1178527/topps_star_wars_card_trader_support.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367279/normal_5f8822750fa89.pdfIn PDF document text
    • https://tubolapibakosi.weebly.com/uploads/1/3/4/8/134872187/8255690.pdfIn PDF document text
    • https://melazikadoxu.weebly.com/uploads/1/3/4/5/134594637/9947889.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418755/normal_5fe34950e6078.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469634/normal_5fbffbb908f94.pdfIn PDF document text
    • https://site-1172210.mozfiles.com/files/1172210/cara_buat_blog_di_hp_android.pdfIn PDF document text
    • https://cdn.sqhk.co/febutatesu/7lhiggN/40985825490.pdfIn PDF document text
    • https://site-1178304.mozfiles.com/files/1178304/audio_converter_application_free.pdfIn PDF document text
    • https://site-1177258.mozfiles.com/files/1177258/jovuxonusepejum.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367296/normal_5fce404b8c0c3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000e641.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE641 5148 bytes
SHA-256: 428cd34a74db7ba1068f2fc755c3a1b17d9648b8ee870c58ba553a7f18aed9f6
font_01_sfnt_off0000f7e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7E7 11436 bytes
SHA-256: f3ecb89817206ec29c4b430c3b6f8155ea9c647aa2cc59aafea5a2380ae73ff2

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