Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ee741868ad880d5…

MALICIOUS

PDF

104.3 KB Created: 2021-06-08 06:23:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 70b5e9af596bab195c7b759aebadd649 SHA-1: 22bfa9f46e680ef17b90c7b7c093de737cc93eb0 SHA-256: 7ee741868ad880d5bb0eef3bf561891cb696e4ab41e9ad23893a825550b275f6
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a significant number of external links, many hosted on disposable domains, indicating a link farm or SEO manipulation tactic. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or distributing further malware. The embedded URLs and the heuristic firings for PDF_SEO_LINK_FARM and PDF_SEO_DISPOSABLE_LINK_FARM support this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://ketchas.ru/pbw?utm_term=cardfight+vanguard+tabletop+simulator+discord PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4481513/normal_5fe5e4f33a118.pdfIn PDF document text
    • https://golagunowij.weebly.com/uploads/1/3/2/6/132695575/8164382.pdfIn PDF document text
    • https://zukigepuzena.weebly.com/uploads/1/3/4/5/134593101/zarerazule.pdfIn PDF document text
    • https://zigamebujadosa.weebly.com/uploads/1/3/4/7/134745820/406b0ad.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414491/normal_60bcb419d6f78.pdfIn PDF document text
    • https://simipupipez.weebly.com/uploads/1/3/4/7/134716676/3829152.pdfIn PDF document text
    • https://nuvugokub.weebly.com/uploads/1/3/4/0/134016684/rupimukurudekuvi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483354/normal_602e48a1c1374.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488566/normal_602fdcf9ead41.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4419225/normal_5ffb2e7368bf1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483836/normal_603e68b9cacbc.pdfIn PDF document text
    • https://zusamazoboxo.weebly.com/uploads/1/3/4/5/134527389/pezilikuj-kopojozuliv-nejovarima-lixipuvaderejur.pdfIn PDF document text
    • https://gilanevevo.weebly.com/uploads/1/3/0/7/130739192/fimujanojajaf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369777/normal_602b5d2e6fee6.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://fijinatuzut.pbworks.com/f/twilight_5_release_date.pdfIn PDF document text
    • http://wuvebag.pbworks.com/w/file/fetch/144428778/solving_systems_of_equations_by_graphing_worksheet_answer_key_kuta_software.pdfIn PDF document text
    • http://rozeluf.pbworks.com/w/file/fetch/144807855/modogeguzuwovijosem.pdfIn PDF document text
    • http://molosafokaji.pbworks.com/f/what_is_hypothesis_testing_in_simple_terms.pdfIn PDF document text
    • http://ruwomodanom.pbworks.com/w/file/fetch/144612429/vawiva.pdfIn PDF document text
    • http://vananizi.pbworks.com/f/ark_survival_evolved_ios_cheat_codes.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

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00013a93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A93 3116 bytes
SHA-256: ea3d9a7f31eb27eff9ee798d4be3433405768693b89fbb1b775cbeada89d62c6
font_01_sfnt_off000145b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x145B2 5676 bytes
SHA-256: 3fc5afdda758be8827f02d5c406f848895acd31c41d4a1453a1b409406806990
font_02_sfnt_off000158d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x158D9 13112 bytes
SHA-256: 71f8de29b2bde8825a074b8a1691ee905b0461cade8ba99c3c9706fb8a40e46a
font_03_sfnt_off000184cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x184CC 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34