Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f2a90a28c46bf93…

MALICIOUS

PDF

63.2 KB Created: 2021-01-29 10:39:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 3f3764e0283ab2166b58276ef4aadb12 SHA-1: 5f566cb34da68e7c96068c56c22acdcfa8ec8f22 SHA-256: 9f2a90a28c46bf93c8a1b8221be8ff7c5e31d72df32d883eaf6e683858bccd8a
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file contains a large number of external links, many hosted on disposable domains, indicating a link farm designed to redirect users to potentially malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the structure and numerous URLs point to a common tactic of using documents to funnel users to attacker-controlled infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://seumenha.ru/aws?utm_term=lagu+on+my+way+cover+gitar PDF link annotation
    • https://pefolasonej.weebly.com/uploads/1/3/4/9/134901659/bubiwarudavamo.pdfIn PDF document text
    • https://cdn.sqhk.co/sawowudin/hYhidie/duzudotano.pdfIn PDF document text
    • https://cdn.sqhk.co/vukupamita/ijXigpT/nugujilipos.pdfIn PDF document text
    • http://keepmaxi.space/27822632759h8in8.pdfIn PDF document text
    • http://reduslim-sitoufficiale.site/fanalowuwijixinu0o3x8.pdfIn PDF document text
    • https://tajixuxax.weebly.com/uploads/1/3/4/7/134751877/1492ba634426.pdfIn PDF document text
    • https://cdn.sqhk.co/rosomugimo/jeTf4Uv/dragonsky_idle_merge_guide.pdfIn PDF document text
    • https://cdn.sqhk.co/gafokoru/hChgbih/dutefufefelugovafiw.pdfIn PDF document text
    • https://cdn.sqhk.co/mitajaso/dAjjKhi/honda_turbo_price_in_pakistan.pdfIn PDF document text
    • https://cdn.sqhk.co/feketukadoz/cl7jAuf/baby_alive_grows_up_doll_commercial.pdfIn PDF document text
    • https://cdn.sqhk.co/navimoxa/jdthadL/marshmallow_dialer_apk_xda.pdfIn PDF document text
    • https://cdn.sqhk.co/roxigeve/5MZRxUr/sakugovexedapagotelowure.pdfIn PDF document text
    • https://cdn.sqhk.co/torujazelome/jfihl2o/boromiguj.pdfIn PDF document text
    • https://cdn.sqhk.co/wexufenu/whe2gfd/love_heart_3d_model_free_download.pdfIn PDF document text
    • https://cdn.sqhk.co/bidomutarili/gjjiAQj/the_rules_of_survival_book_review.pdfIn PDF document text
    • https://xitupiwe.weebly.com/uploads/1/3/4/4/134489196/vitaluzorobafafuzux.pdfIn PDF document text
    • https://cdn.sqhk.co/zidexamuwela/towAieg/can_you_guess_the_disney_song_quiz.pdfIn PDF document text
    • https://jinijazi.weebly.com/uploads/1/3/4/6/134668286/8d644d75c.pdfIn PDF document text
    • https://lowonuve.weebly.com/uploads/1/3/4/5/134584544/8b30b4157.pdfIn PDF document text
    • https://cdn.sqhk.co/patagarinixa/ijDSbjP/ratizuzipek.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000bbbf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBBBF 5104 bytes
SHA-256: a4b61472b31c6beb34b8ad884cf4c2f1bf38be693190905facd2c63501c57eba
font_01_sfnt_off0000cd2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD2D 10084 bytes
SHA-256: 10a5023b18934fd3fea876fae0ff7c8e5bb6069784a74211672aa9550673ad8a