Malicious PDF — malware analysis report

Static analysis result for SHA-256 30fb75b8b06ad894…

MALICIOUS

PDF

77.5 KB Created: 2021-04-08 18:55:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: c852fd670b2fec191c3dd23ca3f0eb9b SHA-1: 7e744cafe8e966535f3f0b4b81330823124a999b SHA-256: 30fb75b8b06ad8946fe1d06f6edf2ad260f0467c4ba836c1e487218258455de5
186 Risk Score

Malware Insights

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

The PDF contains numerous external links, a common tactic for link farms and phishing lures. The primary URL, 'https://lozipotod.ru/strik?utm_term=sword+art+online+fatal+bullet+xbox+one+x+enhanced', suggests a pretext related to a video game search. Heuristics indicate a link farm on disposable hosting, and ClamAV identifies it as a phishing trojan. No scripts were extracted, but the PDF structure itself facilitates redirection to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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=sword+art+online+fatal+bullet+xbox+one+x+enhanced PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4445735/normal_5ff6c0ed8be7d.pdfIn PDF document text
    • https://cdn.sqhk.co/fuxiwimemo/4SVhh5O/witch_s_pranks_frog_s_fortune_full_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/rudolikube/ihSijii/fajilobu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464330/normal_60550da5071af.pdfIn PDF document text
    • https://cdn.sqhk.co/veludewozen/ihaBhhb/homer_and_bart_meme_template.pdfIn PDF document text
    • https://cdn.sqhk.co/xazururoxe/gciaehb/nike_dunk_linen_on_feet.pdfIn PDF document text
    • https://cdn.sqhk.co/jaxugaveg/fjblWjc/81553771265.pdfIn PDF document text
    • http://xevojifixifepi.scienceontheweb.net/gunudalinidadipanek.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481157/normal_605bfff06c1b8.pdfIn PDF document text
    • https://cdn.sqhk.co/miwavilusaji/18yigid/poguwazuxagudifigilanema.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496580/normal_60166fe39dde3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4482189/normal_5fff236688856.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/sasufufa/lg_refrigerator_service_centre_contact_number.pdfIn PDF document text
    • https://5e7fdb44-65a6-4d88-9b36-b69c04d36e08.filesusr.com/ugd/b547b4_5094615eb07d44a6ab5792b730646f7d.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tevomenil/fizesaboweguxuwesonabor.pdfIn PDF document text
    • https://7f06b679-e14d-4525-8955-d56a7cf6f710.filesusr.com/ugd/79e5df_f0571bf26ae14861942e1a8ed720fb84.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fibesezati/latest_call_of_duty_ps4_2020.pdfIn PDF document text
    • http://pezefaxovojole.atwebpages.com/25048446722.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_off0000f143.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF143 5336 bytes
SHA-256: c9339986045476f2864dd8f0d305ac89cacf5efd73ea76a7992511ba4d68d09e
font_01_sfnt_off00010379.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10379 10908 bytes
SHA-256: 02fea0320d04ed8f4f5858ea2a7f2f833524e893590ebeaefe90b06f9778b52f

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