Malicious PDF — malware analysis report

Static analysis result for SHA-256 482f3779a49660a8…

MALICIOUS

PDF

80.5 KB Created: 2021-03-29 03:07:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: c8fdf836671606b6d54f10233a17fe0f SHA-1: 80f21eccf223da4b7ebae48a31c5bfa92866b41b SHA-256: 482f3779a49660a86073bf2d95fa8f6259f6ca05f6e5d4019d85518e8b3d9ada
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to disposable hosting and are used in a link farm strategy, indicating a phishing or scam attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution via these links. Although no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a malicious document designed to redirect users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

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/strik?utm_term=history+of+modern+art+book+pdf PDF link annotation
    • http://gupiduwexe.22web.org/chemistry_laboratory_equipment_and_their_uses.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380680/normal_6025c5cab14bd.pdfIn PDF document text
    • http://zakovekapi.22web.org/chromedriver_older_versions.pdfIn PDF document text
    • http://kudikadip.getenjoyment.net/62320383500.pdfIn PDF document text
    • http://bunnygummy.ru/mawugaruzumokundli0g.pdfIn PDF document text
    • http://powerhdniy.space/paraphrasing_sentences_exercise8jyyg.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384645/normal_602729ac683b9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473902/normal_6031fc23db048.pdfIn PDF document text
    • http://duzatizej.iblogger.org/titan_440_filter_direction.pdfIn PDF document text
    • http://teren.fun/dumasemosald49wv.pdfIn PDF document text
    • http://vivekawiga.sportsontheweb.net/jisikupunudoxomovuxiv.pdfIn PDF document text
    • http://gufebuxixubo.iblogger.org/mugeragilifeme.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479214/normal_603edcde9b25b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470979/normal_5fceb7fa37dac.pdfIn PDF document text
    • http://xifogoweru.22web.org/39546438434.pdfIn PDF document text
    • http://peromopativej.mypressonline.com/who_is_our_lady_of_the_lake.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388614/normal_60074cd536843.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501989/normal_6058a45cdf0a5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4372376/normal_5fce5eed74bbd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487916/normal_6051688e81c11.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pomirunorejuso.epizy.com/dodixojubilejabizerijo.pdfIn PDF document text
    • http://kivozusemu.atwebpages.com/nordic_track_exp_1000s.pdfIn PDF document text
    • http://pifetageror.epizy.com/introduccion_al_algebra_lineal_larson_gratis.pdfIn PDF document text
    • http://kejefutipetube.epizy.com/origen_del_capsicum_annuum.pdfIn PDF document text
    • http://vuzujalaj.epizy.com/32468465617.pdfIn PDF document text
    • http://mavuriwowul.myartsonline.com/auckland_region_map.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_off0000fe4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE4A 5424 bytes
SHA-256: 3c4932539df591789175f38537a18766eabacc37eeeff03ce542400bdfacd24e
font_01_sfnt_off000110a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110A3 10364 bytes
SHA-256: 33680dd9b89ea7832933ccab0c13302409456893e7f33532e2788862cbb7329d

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