Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0522cdf67cce922…

MALICIOUS

PDF

80.8 KB Created: 2021-05-30 06:23:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: f2674a213a6da63966d2a639a5a592c9 SHA-1: 20af79782e6bd199ddb3614c78baea56962ff420 SHA-256: b0522cdf67cce9228bd613e1428bc2ca1007e1eaa956e53c6b08d200e55c9cf4
244 Risk Score

Malware Insights

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

This PDF document functions as a link farm, presenting numerous links to external websites under the guise of providing game cheats. The primary malicious URL identified is https://crophysi.ru/strik, which is flagged as a malicious redirector. The document's structure and content strongly suggest a phishing or scam attempt designed to drive traffic to potentially harmful sites.

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 links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://crophysi.ru/strik?utm_term=hill+climb+racing+cheats+iphone+no+jailbreak In PDF document text
    • https://vomedizi.weebly.com/uploads/1/3/5/3/135312409/ruduwuzifajem-jodanaze.pdfIn PDF document text
    • https://zizusufake.weebly.com/uploads/1/3/4/6/134646877/garegibob.pdfIn PDF document text
    • https://pakipuxis.weebly.com/uploads/1/3/5/3/135347710/tekefor.pdfIn PDF document text
    • https://bedizegoresupa.weebly.com/uploads/1/3/1/3/131379398/617887.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454982/normal_60690c9fcb7ea.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473039/normal_5fd82feb131d9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450625/normal_5ffcfc642ca4b.pdfIn PDF document text
    • https://woloxujujesif.weebly.com/uploads/1/3/4/7/134716607/0dbf873f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4492901/normal_603926c4f3c9d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481273/normal_6054e0cc835c6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378152/normal_600fbbf125047.pdfIn PDF document text
    • https://bipakevulof.weebly.com/uploads/1/3/4/6/134602937/rotenime.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416139/normal_601b1e9d4ebf4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4448347/normal_5ff26b0535374.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4455208/normal_5feb93e8a9d01.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496216/normal_605d80ce7ab7f.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/d31d3e82-0c2c-4aae-8f2d-2d52e4f53065/setelumuputaselosudoramo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/24017f0f-8a00-42a1-b466-1afb4481456b/kenmore_70_series_washer_agitator_parts.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_off0000e4d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4D6 5588 bytes
SHA-256: ce4121664ff5436ec2d00d3f68efeaa7ca70e291a6560d88e11958dd1d831337
font_01_sfnt_off0000f7a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7A7 12108 bytes
SHA-256: 999326e6c7b7b77c11e6638fdf1a7b04f58fd10950a968ba6bfa972ab7ee0d0c
font_02_sfnt_off0001201a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1201A 16204 bytes
SHA-256: 541fa2b6826b0add99b7d5a173ef1e6a5567607b5192f75b810eb17d6a563501