Malicious PDF — malware analysis report

Static analysis result for SHA-256 c99aed66cfe7f4e1…

MALICIOUS

PDF

74.3 KB Created: 2021-03-03 18:13:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 2b94b4a80ab39f8f1869ec8b0308948d SHA-1: 2f8aa07cd7b091ce813041487dd0e45a76a1db60 SHA-256: c99aed66cfe7f4e11d256cac35468840e9c07a2723025a3ca944b30d26a2e829
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to disposable hosting and link farms, a common tactic for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. The presence of external URIs and the overall structure suggest the document is designed to redirect users to potentially harmful 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://lozipotod.ru/123?utm_term=can+i+use+my+iphone+as+a+smart+tv+remote+for+a+non PDF link annotation
    • https://motuzepiruwilo.weebly.com/uploads/1/3/4/3/134348631/rebati.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4479439/normal_5ff760c96aa89.pdfIn PDF document text
    • https://xoregofejaba.weebly.com/uploads/1/3/4/6/134651656/jomefuzedalofawo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391599/normal_603ad2ed0f460.pdfIn PDF document text
    • http://dosijefa.mypressonline.com/jovet.pdfIn PDF document text
    • https://wavogovarixu.weebly.com/uploads/1/3/1/3/131379914/lapiregu.pdfIn PDF document text
    • https://taleputara.weebly.com/uploads/1/3/4/3/134305900/sisutexidoxajirotox.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://todabopojexojad.epizy.com/philips_shaver_9000_replacement_head.pdfIn PDF document text
    • https://s3.amazonaws.com/xakajoziwibi/motion_5_kinetic_typography_template_free.pdfIn PDF document text
    • http://bexukavibume.myartsonline.com/is_blood_elf_warrior_good.pdfIn PDF document text
    • http://numakuzugurewi.rf.gd/how_to_unclog_a_keurig_coffee_machine.pdfIn PDF document text
    • http://lofomaseforuz.rf.gd/how_to_learn_python_from_scratch_quora.pdfIn PDF document text
    • http://xilutetixu.epizy.com/curriculum_vitae_formato_gratis.pdfIn PDF document text
    • http://pevipitoz.atwebpages.com/30308507241.pdfIn PDF document text
    • http://juvejuvikanu.epizy.com/xifasafafafuzun.pdfIn PDF document text
    • https://s3.amazonaws.com/polojuliragam/45651743564.pdfIn PDF document text
    • https://s3.amazonaws.com/debamijizozexo/taenia_pisiformis_life_cycle.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_off0000e8b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8B5 5176 bytes
SHA-256: 87de2241b45ae559ca0e8f582a5492eab053d4824778361741cbf5c41220414c
font_01_sfnt_off0000fa33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA33 9888 bytes
SHA-256: 284edf0e64af180aa4b2e1260f56432d7c50005be468a24bbb0e6423b6c1789e

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