Malicious PDF — malware analysis report

Static analysis result for SHA-256 0750f7e06ca1a401…

MALICIOUS

PDF

77.6 KB Created: 2021-02-19 22:41:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 9ec2287716cdd22fa5eeaa2512743e9f SHA-1: 40c35454492e47fecd8954acc13d7efbc78e91a6 SHA-256: 0750f7e06ca1a4019415b50d751302e62fded4392c4ced49e9ce05bcf7bb3bc0
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The document contains numerous embedded URLs pointing to disposable domains, suggesting a phishing or malware distribution scheme. The presence of these links indicates an attempt to redirect users to malicious sites, likely for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 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://crophysi.ru/strik?utm_term=must+watch+anime+series+on+netflix PDF link annotation
    • http://ceter.xyz/99952597641m4zr9.pdfIn PDF document text
    • http://myirn.icu/sabononupijazedezobilrbvim.pdfIn PDF document text
    • http://fixmarker.fun/the_cask_of_amontillado_vocabulary_practice_worksheet_answerso7if0.pdfIn PDF document text
    • http://organicnu.info/836728823673ujaw.pdfIn PDF document text
    • http://azakalaza5.xyz/dragon_ball_z_fighting_games_apk2dbzj.pdfIn PDF document text
    • http://cardioactiveufficiale.site/texowizaxugeganias1oz.pdfIn PDF document text
    • http://linza.media/notebook_and_pencil_free_cliparti2vg1.pdfIn PDF document text
    • https://cdn.sqhk.co/togokitaz/h0hahhQ/36044829013.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4394066/normal_60162bffceb5c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445573/normal_602b8dd5f4053.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455639/normal_60111916037bf.pdfIn PDF document text
    • http://maslovauto.ru/ribagalupazarenovv7bxb.pdfIn PDF document text
    • http://discount50it.pro/the_standard_hotel_nyc_careersmmph8.pdfIn PDF document text
    • https://lenonexijinex.weebly.com/uploads/1/3/4/6/134647177/tiromepibivutixep.pdfIn PDF document text
    • http://selectgetc.top/tafevamewubadpt2x.pdfIn PDF document text
    • https://zegesunipatobas.weebly.com/uploads/1/3/1/3/131379774/jagodobobugi-mevudad.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://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_off0000e505.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE505 5168 bytes
SHA-256: db7bd7fdbbbe3eebbd37c6769f934872ca5681b06a96c7279e0c17f15a73ae54
font_01_sfnt_off0000f67a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF67A 10692 bytes
SHA-256: 1d69a5a82f2c96471a2ebb1041f77e69a6473062b9c931937e0004288b17a5c9
font_02_sfnt_off00011b12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B12 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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