Malicious PDF — malware analysis report

Static analysis result for SHA-256 712ecd68c8faa2d8…

MALICIOUS

PDF

85.3 KB Created: 2021-03-20 11:18:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b670d86ed3169f979bd189af1a4b6995 SHA-1: 78da04dc9e74d07ce856b6884b619275baa7ceb8 SHA-256: 712ecd68c8faa2d859c94f0e148d682a702350c61045e4a338f4410c891b1dd0
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified as a 'PDF link farm', pointing to various domains. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. While no scripts were directly extracted, the PDF structure and numerous external URLs suggest an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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
  • 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://soxebez.ru/wix?keyword=irma+infante+dorantes+fotos
    • http://rolopigabetitu.scienceontheweb.net/aristotle_plato_socrates.pdf
    • https://cdn.sqhk.co/bulunazi/OgdLgjD/47356272281.pdf
    • http://rivozuzeno.mywebcommunity.org/bejoziwulinamelusunadim.pdf
    • https://kobamewimituk.weebly.com/uploads/1/3/1/6/131606733/bosomesenalu.pdf
    • https://cdn.sqhk.co/galotakizin/gjojdjd/crazy_traffic_control.pdf
    • https://cdn.sqhk.co/nodezaneripe/ijcDrB2/places_to_get_costumes_for_halloween_near_me.pdf
    • https://mabajiluvepe.weebly.com/uploads/1/3/1/4/131409333/95fdd065747.pdf
    • https://nojonepidafajik.weebly.com/uploads/1/3/0/7/130775859/3e1d9e8c995b1.pdf
    • https://cdn.sqhk.co/nadetajagupe/kigPjca/hunter_zombie_shooting_dead_sniper_apocalypse.pdf
    • http://beritox.medianewsonline.com/acleis_nglm_24_5h.pdf
    • https://kuzosilu.weebly.com/uploads/1/3/2/8/132815793/mepofupaku.pdf
    • https://gogabaxada.weebly.com/uploads/1/3/4/8/134852864/wupifu.pdf
    • https://cdn.sqhk.co/sotisajen/5khdtge/lovaroviv.pdf
    • https://wazolupagod.weebly.com/uploads/1/3/0/7/130775763/lalopo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/saxefi/holt_african_american_history_textbook.pdf
    • https://s3.amazonaws.com/pujinit/24939072400.pdf
    • https://s3.amazonaws.com/pasawe/noviledegemab.pdf
    • http://duvodix.myartsonline.com/ayatul_kursi_word_by_word_translation.pdf
    • https://s3.amazonaws.com/tanikanaw/aoe_tren_garena.pdf
    • https://s3.amazonaws.com/jasipefulaxiduj/diploma_civil_engineering_books_in_tamil.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_off0001012c.bin
1b98d263f570665ff329925a56020e2af1cfc20ee3fd0a6afe40c076817d0ef6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1012C 4748 bytes
font_01_sfnt_off0001111b.bin
76e2d075227018a97af171cba33248e6e1b64aae022a2822516d40b647dc0f6b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1111B 12104 bytes
font_02_sfnt_off0001383f.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1383F 4324 bytes

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