Malicious PDF — malware analysis report

Static analysis result for SHA-256 2eeda14abc5d15d9…

MALICIOUS

PDF

73.9 KB Created: 2021-03-25 17:07:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: eb1c65fe9102e4438a376bd6353e5975 SHA-1: 21c941d445a50b50c88aff2d6c825723f0078cc0 SHA-256: 2eeda14abc5d15d9716826a2b60d8f74ef09eb6899a3d0088d4cd19cbfdcc7e2
186 Risk Score

Malware Insights

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

The PDF file contains a deceptive link farm, with one prominent URL pointing to 'vilenefex.ru'. The document body, though heavily obfuscated, contains text related to 'Best 55 inch samsung tv canada', suggesting a lure to trick users into clicking the malicious link. The presence of numerous external links and the ClamAV detection strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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 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://vilenefex.ru/strik?utm_term=best+55+inch+samsung+tv+canada PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4377109/normal_5fe671b08a87a.pdfIn PDF document text
    • https://cdn.sqhk.co/vagofedewat/jhjW6Ke/jobapajotub.pdfIn PDF document text
    • https://cdn.sqhk.co/dasekizob/jjgkI4z/18183139665.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381081/normal_600f07931d7e0.pdfIn PDF document text
    • https://cdn.sqhk.co/pomoliwekag/Djgjjja/wadakagumexowikum.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459774/normal_603968cc36350.pdfIn PDF document text
    • https://cdn.sqhk.co/petebeki/ijhs05Y/my_home_design_dreams_free_online.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4474739/normal_5ffa5b4520660.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447487/normal_603fa042ca3ca.pdfIn PDF document text
    • https://cdn.sqhk.co/zexupibo/datNiaI/child_care_licensing_colorado_rules_and_regulations.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://459ec6dd-5b69-4322-a182-74abbfaa0e48.filesusr.com/ugd/221eaa_3d1b6451085c449ba68ca00f726e9aad.pdf?index=trueIn PDF document text
    • http://nezebur.epizy.com/tales_of_vesperia_walkthrough.pdfIn PDF document text
    • https://s3.amazonaws.com/joterige/cisco_router_model_dpc3825_login.pdfIn PDF document text
    • https://84d655c4-d84a-4a0c-9c32-0387925bd622.filesusr.com/ugd/6233da_b837e5c22b8c46b29fa59ad41d14a546.pdf?index=trueIn PDF document text
    • http://maruduxelukar.rf.gd/tomikoxasonafot.pdfIn PDF document text
    • https://s3.amazonaws.com/pibajuwi/toshiba_tv_dvd_combo_problems.pdfIn PDF document text
    • https://s3.amazonaws.com/fidobakipivogit/binomial_theorem_problems.pdfIn PDF document text
    • https://2a497570-3881-454f-aefc-229a18bbdf22.filesusr.com/ugd/83e24f_65ddf45f175340729f1a84c554c96f52.pdf?index=trueIn PDF document text
    • https://a3de454e-1598-42bb-a259-4eb69c42f179.filesusr.com/ugd/fb5067_2e0b5e997de6485e9a7f951ce92207fa.pdf?index=trueIn PDF document text
    • https://6acf0ca1-aa41-4771-8b91-54baff69ee7f.filesusr.com/ugd/7d1dc9_e4fb4e20394945c4b3c4777a8b6952e5.pdf?index=trueIn PDF document text
    • http://zimeketoxera.epizy.com/79320427331.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_off0000e2f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2F9 5456 bytes
SHA-256: 8eead42f3ee650bc48de134ddc57eabb05c89c62cb27b8eb8d775233a8639104
font_01_sfnt_off0000f57b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF57B 10736 bytes
SHA-256: 5323f6df9c45d7af4fca49d0e92ee12ae61726cac4742bdc42dd7f3dd39623d6