Malicious PDF — malware analysis report

Static analysis result for SHA-256 9fe97334a333f494…

MALICIOUS

PDF

73.8 KB Created: 2021-06-13 18:13:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0d08123f8c4821d4e795626bcca6552b SHA-1: 999df0d25df189b33dfa0101518a2bee6e8bd6a0 SHA-256: 9fe97334a333f494748f8dd698722c1762580f2a2bd654a6c9483479d173f4d3
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The numerous embedded URLs point to compromised CMS upload directories and disposable hosting, indicating a link farm designed to redirect users to malicious sites. While no scripts were explicitly extracted, the nature of the URLs and the detection suggest it's likely a phishing or malware distribution lure.

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
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://archism.ru/uplcv?utm_term=kaun+tujhe+yun+pyar+karen
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/4f5caaeb7011127d2bc25f1d9c2b07a8/mamusigasom.pdf
    • http://tuzvedo.hu/elemek/file/98185387174.pdf
    • http://bet-balance.com/userfiles/file/vivogaxonokukomadad.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098479076659---relog.pdf
    • http://ei-windykacja.pl/upload/file/25636618835.pdf
    • https://yourlightingbrand.com/wp-content/plugins/super-forms/uploads/php/files/8394258f69631c4f7fae46489bbef820/tomalivejenamofedipula.pdf
    • https://thejasmineway.net/wp-content/plugins/super-forms/uploads/php/files/dc6b0bcdn90sn2vnn8e5j5rqgi/pugafimopisoxinagoxam.pdf
    • https://www.federatedlighting.com/wp-content/plugins/super-forms/uploads/php/files/4ff548b589544f571d49589bd0b29d58/zadelozivinajawukoruza.pdf
    • http://rethabise.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160a89eaba6fe2---niruji.pdf
    • https://prikolnaya.com/wp-content/plugins/super-forms/uploads/php/files/5c4edbc13a398c633fd28dbc0a5300af/29864332156.pdf
    • http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/97e33461c492320d76b46bcf65db4c07/xajumusigawoveganaka.pdf
    • https://hospvetcentral.pt/site/upload/file/bakegaritesezuzowet.pdf
    • https://bykevin.com/wp-content/plugins/super-forms/uploads/php/files/0c1e0c0c6ad2125776f6d106764306ae/87346719596.pdf
    • http://www.sunargrup.com.tr/wp-content/plugins/super-forms/uploads/php/files/gse8nn9sju2bm55a385ui37393/vijemolewolifozub.pdf
    • https://gites-les-bardots.com/userfiles/file/60980478013.pdf
    • https://www.bouldersudbury.org/wp-content/plugins/formcraft/file-upload/server/content/files/160948a0c57a1a---2436063970.pdf
    • http://accomplishtheimpossible.com/userfiles_ati/file/80976075451.pdf
    • https://nscs.org/wp-content/plugins/super-forms/uploads/php/files/8c086b92a32740c36301e56fb8891112/53145525380.pdf
    • http://vegasoft.hr/wp-content/plugins/formcraft/file-upload/server/content/files/1606fe706330a3---34593007027.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e50f.bin
243fd98e330a6a65b0900e3f7efdd7007b31360175bf6b637854ece662db7f3e
pdf-font-stream PDF embedded font (sfnt) at offset 0xE50F 4908 bytes
font_01_sfnt_off0000f5c9.bin
c3a12edac261153a2c431496de240a9d643b2a6a2e6cee38fb285328225757f0
pdf-font-stream PDF embedded font (sfnt) at offset 0xF5C9 10816 bytes