Malicious PDF — malware analysis report

Static analysis result for SHA-256 f9edb898858f0860…

MALICIOUS

PDF

84.3 KB Created: 2021-03-14 06:50:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 845636aa8ec6ebaa6117a7659d0c7b6f SHA-1: 12924c994622ba88bbcae2e26dec3e021eda7bdd SHA-256: f9edb898858f0860961d9d756104b845830e8301e5f3ae830c204b2d94910d7a
196 Risk Score

Malware Insights

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

The PDF document exhibits characteristics of an advance-fee scam, as indicated by the 'SE_ADVANCE_FEE_SCAM_LURE' heuristic. It contains numerous external links, including a link farm, suggesting an attempt to direct users to malicious websites. The ML classifier and ClamAV detection further support its malicious nature. While no scripts were explicitly extracted, the presence of external links and the scam lure point towards a phishing or redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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=model+3+and+model+y+side+by+side
    • https://cdn.sqhk.co/tevosenijosu/abVjbkg/14722122173.pdf
    • https://kufudazasa.weebly.com/uploads/1/3/4/6/134626120/d9717.pdf
    • https://cdn.sqhk.co/togokitaz/88BwdUa/baby_growth_spurts_during_pregnancy.pdf
    • https://cdn.sqhk.co/gabadifofibo/dIgfukL/16714838063.pdf
    • https://mexekujiwununiv.weebly.com/uploads/1/3/1/4/131407761/rafuga_zupini.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/052ea9d4-90e8-4911-b9ca-8cb195339502/84147580522.pdf
    • https://uploads.strikinglycdn.com/files/8beec39a-884e-44f3-bae5-49374a9f42b5/neuro_linguistisches_programmieren_fr_dummies.pdf
    • https://uploads.strikinglycdn.com/files/aa131343-5b25-4151-aa11-b8d5c3d1f0df/9362051913.pdf
    • https://uploads.strikinglycdn.com/files/38af1c6c-80a4-4542-9b96-62a9748719b0/why_is_creativity_important_in_sport.pdf
    • https://s3.amazonaws.com/jenisozazewubo/34885873958.pdf
    • https://s3.amazonaws.com/zesixefe/echocardiography_guidelines_2019.pdf
    • http://fopadunopim.epizy.com/what_are_some_unjust_laws_in_america_today.pdf
    • https://s3.amazonaws.com/xafaxotaful/besasatoro.pdf
    • https://uploads.strikinglycdn.com/files/f5dc67ac-1173-48fc-a961-a1cb24fadb6a/cannon_36_gun_fireproof_safe_review.pdf
    • https://s3.amazonaws.com/zolerazowubow/16157061884.pdf
    • http://duwopatovulid.rf.gd/jira_export_backlog.pdf
    • http://diwifesatikebak.epizy.com/wireless_bluetooth_headphones_for_android_phones.pdf
    • https://s3.amazonaws.com/bomifabipi/87444075268.pdf
    • https://uploads.strikinglycdn.com/files/f0484fc0-1a1c-4298-90e5-8d5852aa9969/best_bodyweight_workouts_to_lose_weight.pdf
    • https://uploads.strikinglycdn.com/files/dcdf1c3e-012c-4758-94cb-88d0147a50d0/4561839892.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ff7c.bin
6f93e9acde3d1c389d536d55271bb5437fc8a4fa459c02cf1b614b9ed2f3547e
pdf-font-stream PDF embedded font (sfnt) at offset 0xFF7C 5288 bytes
font_01_sfnt_off00011172.bin
bc393f1046a507fd6c71a7917691c45f8948f28c3df375cc2370576edf60eaa5
pdf-font-stream PDF embedded font (sfnt) at offset 0x11172 2328 bytes
font_02_sfnt_off00011bd6.bin
1ad2b2b5d67db02a5ea7f4d4daee3a956f343d7b4a1406d1defe9adff6d6c52f
pdf-font-stream PDF embedded font (sfnt) at offset 0x11BD6 11600 bytes