Malicious PDF — malware analysis report

Static analysis result for SHA-256 e06809f70487fa78…

MALICIOUS

PDF

70.9 KB Created: 2021-03-12 00:30:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: f1c26cb8744b49ef50b4eceab53f6b53 SHA-1: 10df9614e61c9f02dad483e58c79103b382261b4 SHA-256: e06809f70487fa7863b29b04be6d0adb068cee519d13a22647c711f627bf96a5
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous embedded URLs, with a critical heuristic flagging it as malicious and ClamAV detecting it as a phishing trojan. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates the PDF is part of a link farm hosted on disposable domains, suggesting a phishing or malware distribution scheme. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://jumiwimov.ru/wix?keyword=cyber+shot+user+guide+rx100 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4497685/normal_6031ba55908e3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387226/normal_5ff7ae6a7ec96.pdfIn PDF document text
    • https://bisigategisabuv.weebly.com/uploads/1/3/4/8/134884720/sutupoki_pipupesigibu_semolenekujujo.pdfIn PDF document text
    • http://zalanikovuz.iblogger.org/pegarisebomapajad.pdfIn PDF document text
    • https://walinakonefal.weebly.com/uploads/1/3/4/3/134316097/2021562.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378153/normal_60144d7a50db4.pdfIn PDF document text
    • https://rifuxegu.weebly.com/uploads/1/3/4/5/134525143/2975023.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495551/normal_60142cd077365.pdfIn PDF document text
    • https://fegoparowewara.weebly.com/uploads/1/3/4/3/134321013/b647d64e50.pdfIn PDF document text
    • http://sovozuzujujike.22web.org/what_is_wisdom_and_understanding.pdfIn PDF document text
    • https://wujipiledulom.weebly.com/uploads/1/3/4/6/134695719/zavopag-dotusajile-xuxuro-wirid.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fapibudu.epizy.com/julumoliviruxuke.pdfIn PDF document text
    • http://zijomofi.epizy.com/jolefagigegogamelarixida.pdfIn PDF document text
    • http://pegamivefeja.rf.gd/how_to_become_a_pentecostal_pastor.pdfIn PDF document text
    • http://vukelas.rf.gd/why_has_my_dyson_fan_stopped_working.pdfIn PDF document text
    • http://rawobebisef.epizy.com/buku_belajar_bahasa_jepang.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6ef6c9e1-bdd2-4f72-9f1e-7654c774ad59/asus_rampage_vi_extreme_bios_update.pdfIn PDF document text
    • http://litezopufesox.epizy.com/92690770078.pdfIn PDF document text
    • http://kamaxunavag.epizy.com/xalugefugopifixo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e8f5b078-42f1-43e1-8914-2722dcfb2421/vurat.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ecee4078-a667-409c-a871-543965b221a1/jodifefol.pdfIn PDF document text
    • http://rigirulame.epizy.com/briggs_and_stratton_3hp_engine_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c99ba331-6bbb-4dc5-a5a5-b8a3eb66c779/manebagabewawege.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_off0000da99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA99 5252 bytes
SHA-256: 8eacf3cddeb2395defb828a6d793be8c01b49f5903b7c66a53a234345fce5dd5
font_01_sfnt_off0000ec7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC7D 9996 bytes
SHA-256: 297e3ab4c32a3206887723375b74b9a78fc79705225ed0d406b16c787dec52b1

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