Malicious PDF — malware analysis report

Static analysis result for SHA-256 382c1d7f7764bf5b…

MALICIOUS

PDF

86.4 KB Created: 2021-02-28 07:45:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 233b9b5ab995c3afb2ef0db115039750 SHA-1: 21ae5d1101c3b724de81fcb217ead8970cb079ce SHA-256: 382c1d7f7764bf5b2c41b124ffc5e589c4c7c486997564b56ab0520498adcd96
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic indicates it functions as a link farm, directing users to numerous distinct hosts, with a primary URL being https://fokemale.ru/award. This suggests a phishing or malware distribution attempt, likely initiated via spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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/award?keyword=learn+hindi+letters+online PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4367013/normal_5fd9ea17ecbcb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380084/normal_5fcaf5e199fbc.pdfIn PDF document text
    • http://xisumagogali.getenjoyment.net/pt_cruiser_transmission_fluid_fill.pdfIn PDF document text
    • https://pekixozere.weebly.com/uploads/1/3/5/3/135397988/400e2a03d4ad.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391000/normal_5fd7d013c7fb1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451375/normal_5fcdaf2c17a3c.pdfIn PDF document text
    • http://idealica-italiaufficiale.site/17622175618xbj4o.pdfIn PDF document text
    • https://rawoxozuk.weebly.com/uploads/1/3/2/6/132695352/ruvezofisa.pdfIn PDF document text
    • https://wikagigodoxuf.weebly.com/uploads/1/3/2/8/132814929/c8a172c.pdfIn PDF document text
    • http://abanca-electronica.com/how_do_i_connect_my_receiver_to_wifis6yze.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451049/normal_5ff7d4ddc73ed.pdfIn PDF document text
    • http://geleostone.online/genie_intellicode_keypad_setupd5v06.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385847/normal_6026e15177a26.pdfIn PDF document text
    • http://whowill.ru/7th_grade_sentence_examplesfsyqx.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421341/normal_602264a854bdd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404984/normal_603756789f72d.pdfIn PDF document text
    • https://nedetuvozuwe.weebly.com/uploads/1/3/4/6/134699612/jozosuzorotab_moluporovivik_mimifeted.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://wififeju.atwebpages.com/3209157555.pdfIn PDF document text
    • http://gekolutewubel.myartsonline.com/8946027718.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000109f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109F7 4644 bytes
SHA-256: f6abc787ca151604e1f9ca0ed3c11a65f951ee616515363b63c4c15136ce210d
font_01_sfnt_off000119a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119A2 10704 bytes
SHA-256: 9ff9b3fdc4be991be4a84d0a0e2d64f91762f6f2bd61beb4d886ac2da603f47d
font_02_sfnt_off00013e3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13E3A 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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