Malicious PDF — malware analysis report

Static analysis result for SHA-256 67483bb7affc8eae…

MALICIOUS

PDF

127.2 KB Created: 2021-05-25 13:40:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 6951d9ac67e9f8fbdfc79b8ae0a8fc80 SHA-1: 2616d74048431437e89017f6bcfd6f77d2cd7985 SHA-256: 67483bb7affc8eae7f865db698a87543402345d7b293b8e1e0455f32b1ac6400
186 Risk Score

Malware Insights

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

This PDF document is identified as malicious by both ML classification and ClamAV, indicating a high likelihood of malicious intent. It contains a link farm with numerous external URLs, one of which is `https://lozipotod.ru/strik?utm_term=capitec+application+form+for+learnership`, suggesting a phishing or credential harvesting attempt disguised as a Capitec application form. The presence of embedded JavaScript, though not fully detailed, further supports the potential for malicious actions like redirection or payload delivery.

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://lozipotod.ru/strik?utm_term=capitec+application+form+for+learnership PDF link annotation
    • https://sixamipad.weebly.com/uploads/1/3/4/7/134726782/a1867777.pdfIn PDF document text
    • https://tumonejaw.weebly.com/uploads/1/3/6/0/136086042/6227095.pdfIn PDF document text
    • https://zazanopub.weebly.com/uploads/1/3/2/7/132712119/605783.pdfIn PDF document text
    • https://gokidobizivoji.weebly.com/uploads/1/3/4/4/134495246/5020259.pdfIn PDF document text
    • https://xilamexazoleguj.weebly.com/uploads/1/3/2/6/132695560/3874061.pdfIn PDF document text
    • https://fadasizoguwo.weebly.com/uploads/1/3/6/0/136050507/resosizoxeselorixinu.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/733d9980-8ba4-4fd1-a8c6-6d15a66e780b/how_to_program_vizio_remote_to_charter_cable_box.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f52bde77-204a-404f-a850-d1a49daefe8c/samsung_q7_55_inch_wall_mount.pdfIn PDF document text
    • https://s3.amazonaws.com/kewuxejikiwe/kawachi_fuji_garden_japan_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1150e125-a9f9-4b6f-a039-0a4cdde0c3b6/reasons_to_stay_alive_free_audiobook.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/416b49ef-2977-4c6c-8108-f149c05ed04e/star_wars_bloodlines_characters.pdfIn PDF document text
    • https://s3.amazonaws.com/baxekojojexusol/96433828574.pdfIn PDF document text
    • https://s3.amazonaws.com/wutezigojuxi/acronis_true_image_full_version_free.pdfIn PDF document text
    • https://s3.amazonaws.com/lolaritemukole/95341000758.pdfIn PDF document text
    • https://s3.amazonaws.com/gavapozalilup/xogidetija.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/84d31916-3379-44cc-adc7-9e76cbbb6988/grounded_theory_strategies_for_qualitative_research.pdfIn PDF document text
    • https://s3.amazonaws.com/desekusoxi/12336489793.pdfIn PDF document text
    • https://s3.amazonaws.com/muvarelo/xigugezixalesetu.pdfIn PDF document text
    • https://s3.amazonaws.com/solonebosop/samsung_galaxy_note_3_charger_adapter.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7668ce5a-a665-4af8-8a69-6d857b0fedf3/how_to_apply_adhesive_vinyl_to_furniture.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0cba751a-48d1-4167-997d-10f4f304e162/57823064019.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/64ca26e1-2635-4e3f-b91e-f5e19b5d1a1e/89300036495.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001b491.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B491 5160 bytes
SHA-256: 057865a405844474dca58e632c90baa5709ee767af6389fdcba10b9fc93e933d
font_01_sfnt_off0001c5f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C5F0 11840 bytes
SHA-256: b02ac7e883da103bdc3f1bed46d0722f14e9386d7d07bf3ad663262bd26bcd9c