Malicious PDF — malware analysis report

Static analysis result for SHA-256 75eb981091453924…

MALICIOUS

PDF

67.8 KB Created: 2021-01-14 23:49:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: 7d734370e034e4a7b2d66bb5aa435491 SHA-1: 33dd84a2c34619200a978535330756c7c5ec0001 SHA-256: 75eb98109145392456dfe48b1f8f8423ea67f2a23b9a4fa4c08906930cc81b9a
126 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs and is flagged by heuristics as a link farm on disposable hosting, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the nature of the embedded URLs and the heuristic findings point towards an attack pattern involving directing users to malicious sites, likely for further payload delivery or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • 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 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://trafficel.ru/aws?utm_term=accounting+and+finance+book+pdf+free PDF link annotation
    • https://cdn.sqhk.co/xezexasag/YLsIIYi/boma_the_great_wars.pdfIn PDF document text
    • https://site-1223352.mozfiles.com/files/1223352/logo_quiz_minimalist_level_11_answers.pdfIn PDF document text
    • https://site-1178268.mozfiles.com/files/1178268/wujutefopalidab.pdfIn PDF document text
    • https://jisuxewaxem.weebly.com/uploads/1/3/1/8/131857679/642617.pdfIn PDF document text
    • https://site-1172210.mozfiles.com/files/1172210/disneyland_paris_packages_2020_from_south_africa.pdfIn PDF document text
    • https://site-1178468.mozfiles.com/files/1178468/via_principe_di_udine_7_campoformido_ud.pdfIn PDF document text
    • https://simavaxefawok.weebly.com/uploads/1/3/4/6/134666246/0630f5.pdfIn PDF document text
    • https://site-1176684.mozfiles.com/files/1176684/26271670309.pdfIn PDF document text
    • https://site-1174077.mozfiles.com/files/1174077/lebuxile.pdfIn PDF document text
    • https://site-1173706.mozfiles.com/files/1173706/kamuse.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_off0000c9dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9DC 5304 bytes
SHA-256: c6ca8685e3c4070289b40309ae15ba5965136c6c482316bc03bac1f458e10690
font_01_sfnt_off0000dc00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC00 11400 bytes
SHA-256: 8b9ad1e23378684a1baa1de059f16e7ce8febc9d01580aeff5875e20fc03ed09

Open this report in the interactive analyzer, or submit your own file for analysis.