Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6de15ab95eb691a…

MALICIOUS

PDF

88.0 KB Created: 2021-05-27 03:47:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: dd700fffdaf351b33f26ba2e24f7d8f8 SHA-1: 112ace1335b20a15ba1ddd41eaf1b0ed045cccf8 SHA-256: c6de15ab95eb691ac4a22c23d012f7783b0bbbc3a71150c0df55996cc3ca4fbe
156 Risk Score

Malware Insights

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

The PDF file contains a heuristic indicating it is part of a link farm, with numerous external links. One prominent URL, 'https://xezojetit.ru/strik?utm_term=what+setting+do+you+put+spreader+on+for+grass+seed', is directly associated with the document's content, suggesting a phishing or redirection attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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 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.
  • 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://xezojetit.ru/strik?utm_term=what+setting+do+you+put+spreader+on+for+grass+seed PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4380527/normal_5fc6a3d079cf7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389106/normal_6062066ec9e64.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416149/normal_6015ffb2dea17.pdfIn PDF document text
    • https://nafizanoride.weebly.com/uploads/1/3/4/5/134596231/veduwo-zarezibodapo-rubuv.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403129/normal_600b62a5df7ca.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369307/normal_6041e3ee455ef.pdfIn PDF document text
    • https://xovesoxak.weebly.com/uploads/1/3/0/8/130813458/mibefimubifalulu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369765/normal_605126158e549.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402953/normal_602fca84506f4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417306/normal_6016e09dd1f71.pdfIn PDF document text
    • https://zenozuniwilifa.weebly.com/uploads/1/3/4/1/134131556/5084332.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453329/normal_6062bf97175b1.pdfIn PDF document text
    • https://mugunerer.weebly.com/uploads/1/3/4/4/134479547/siwutugaritol.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
    • https://uploads.strikinglycdn.com/files/b962632d-4684-4dcc-b2a9-37ddd703085c/asp.net_mvc_basic_interview_questions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9de31d18-cb07-499a-9379-90ccf3d1c7aa/fapuzujur.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e1411f24-da47-4f51-9e46-d071cdf575e1/graco_comfy_cruiser_click_connect_travel_system_instructions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a5a6b7f3-2f47-4eef-a4c6-7de3ef329be3/present_perfect_simple_and_continuous_advanced_exercises.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6d210c81-1b83-47b4-807c-c7a98aee0b27/best_way_to_learn_swing_trading.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3a70f715-5e5f-4d0b-8961-f1ba151fe199/suzuki_sv650s_workshop_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e3f35a2b-a86d-44e9-b6a3-2e297777e286/2007_cobalt_maintenance_schedule.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cbbf5d1b-5675-44eb-9a92-6ce4b8b3edf5/19292461077.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010f29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F29 5268 bytes
SHA-256: df41aaea34dc8eb9cfb52c363c3e59769db7df14becc9a38cd7bf2adcfa3f8d1
font_01_sfnt_off00012119.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12119 10252 bytes
SHA-256: 071331f5afd03d794c00951b8051810448f242348d05f09c5b3e31dee3ba2718
font_02_sfnt_off000143f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x143F0 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c