Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa58201e0241f23f…

MALICIOUS

PDF

82.3 KB Created: 2021-04-18 20:45:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 2560903e1b94980f1be2a12690af8316 SHA-1: c83137075a0ba0a506f824da8df9e2dc8360ecad SHA-256: fa58201e0241f23fdd6a849600be79fbb0319731c9f49496fa461daed2fc958a
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many hosted on disposable domains, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of malicious redirection tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://vilenefex.ru/strik?utm_term=the+peaceful+pill+handbook+pdf+espa%25C3%25B1ol PDF link annotation
    • https://jobeluraxofedir.weebly.com/uploads/1/3/4/3/134317239/8386220.pdfIn PDF document text
    • https://rowusebejaron.weebly.com/uploads/1/3/1/6/131637242/tulomuxuzuru.pdfIn PDF document text
    • https://zibubelufi.weebly.com/uploads/1/3/4/5/134517595/zagijajerutem-revepepapewevo.pdfIn PDF document text
    • http://tipografiyav.moscow/brochure_flyer_design_template_freem81jl.pdfIn PDF document text
    • https://lazabegikazake.weebly.com/uploads/1/3/5/3/135315211/kuzox.pdfIn PDF document text
    • https://gikapizuwixa.weebly.com/uploads/1/3/4/0/134097763/7941822.pdfIn PDF document text
    • http://kzrovk.xyz/butokovipuwekemubotutvnkuo.pdfIn PDF document text
    • https://xebazasasixuj.weebly.com/uploads/1/3/4/6/134641459/wotezikiruduvo.pdfIn PDF document text
    • http://legendnat.space/25429441375e9woc.pdfIn PDF document text
    • http://fastpysystem.online/how_to_make_an_adjustable_knot_on_leather_cordkbajw.pdfIn PDF document text
    • http://xekinivafu.iblogger.org/aquaculture_disease_and_health_management.pdfIn PDF document text
    • https://niladituzisum.weebly.com/uploads/1/3/4/7/134736231/lodutugil.pdfIn PDF document text
    • http://crispyset.online/15119239212ahw5o.pdfIn PDF document text
    • http://rigares.iblogger.org/shogun_2_guide_shimazu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/d6f575eb-cf40-41a8-850a-bf5f2c3d20bc/jekabepijejolijimopa.pdfIn PDF document text
    • http://nerepigov.rf.gd/56855253781.pdfIn PDF document text
    • http://zibakogemigana.rf.gd/10361323985.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a9940dbd-c0b7-4f9d-bf67-aa57a3dfd66e/34939108092.pdfIn PDF document text
    • http://tulazonakem.epizy.com/42401514732.pdfIn PDF document text
    • http://bugixud.epizy.com/43513323255.pdfIn PDF document text
    • http://xemixelumulimos.epizy.com/refukekegikije.pdfIn 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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ed68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED68 5512 bytes
SHA-256: 085cee2f40c5d2fb328e2b6844fa4dc3dd2c0620f1be9ab8ede8d8008912fa6b
font_01_sfnt_off0000ffdb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFDB 10976 bytes
SHA-256: ce7b2924ae53715bc844d202a5459c40d686662b67115a88095fb7b65515521b
font_02_sfnt_off0001249c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1249C 16060 bytes
SHA-256: 2173a1880e9f774f759393e7d0d28dda91d04d8a3eae6bea41b822770b343b90