Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ccfda34ff4c04e7…

MALICIOUS

PDF

73.8 KB Created: 2021-03-12 16:57:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 4f2d3df4fde0cc6a6613c4767b2f7092 SHA-1: 0ba362c7899923d6d26f5a1a41d0b33da279a75b SHA-256: 9ccfda34ff4c04e7774a482bb3c4aecc92cc7084d7c039e6844d52ded7baab3a
186 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier with high confidence. It contains a large number of external links, many pointing to disposable domains, suggesting a link farm or phishing operation. The primary URL identified is https://midufefew.ru/123?utm_term=dictionary+of+ancient+near+eastern+mythology+pdf, which is likely part of a phishing or malware distribution scheme.

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
  • 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://midufefew.ru/123?utm_term=dictionary+of+ancient+near+eastern+mythology+pdf PDF link annotation
    • https://cdn.sqhk.co/jarebomu/hiUnCEg/brain_training_logic_physics_puzzles.pdfIn PDF document text
    • https://cdn.sqhk.co/gixotagokezu/jehgiic/fishing_hook_holder_for_boat.pdfIn PDF document text
    • https://cdn.sqhk.co/woberimi/hYLSoia/73987868872.pdfIn PDF document text
    • http://zegererevez.medianewsonline.com/kenmore_dryer_model_110_parts.pdfIn PDF document text
    • https://cdn.sqhk.co/zijigemeworu/chehghj/toxojobam.pdfIn PDF document text
    • http://sawemawe.mywebcommunity.org/how_to_clean_aroma_rice_cooker.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/91b40a8d-5f94-4de2-9b7f-dc9d65db6acb/liforiwemozatuvu.pdfIn PDF document text
    • https://39c3e2ba-dcb8-4bc0-9ed7-0058f02c59d5.filesusr.com/ugd/fd4c29_5e02c113a85945d486ca7e81f9b85d5c.pdf?index=trueIn PDF document text
    • http://mofikasim.epizy.com/axa_framlington_health_fund_performance.pdfIn PDF document text
    • http://koradanizepagow.myartsonline.com/veg_recipes_for_dinner_in_marathi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c00fc157-8838-49e7-a573-1cb92e223d1d/nys_dmv_drivers_license_search.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4727b2dc-32e6-4e21-ac56-6558ee7154e2/625194318.pdfIn PDF document text
    • https://72858ab8-d36f-4bc2-b208-e5ec56e76d01.filesusr.com/ugd/3a4e0e_525b4fb7f2eb46e5bddf61f61846591f.pdf?index=trueIn PDF document text
    • http://nitovotiroxe.epizy.com/itinerary_design_template.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a5190799-0566-499c-8362-a0b4dc389e5c/mexusikenugus.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b323b65a-e40b-40e9-b383-b1ed37eae49e/the_final_empire_characters.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7b2ceaf3-5eb6-4b04-91db-52a39ccf4920/gimp_2.10_tutorials_for_beginners.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b44d642e-56ad-4cc4-a1fa-da148f42147e/can_outside_be_used_as_an_adverb.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/18559c30-2edf-49e6-8959-65908fe13031/25299923656.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_off0000d4ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4AD 5460 bytes
SHA-256: 4b184fd9c192483a0d0b04971644a1dd693b6b57337b8364d6384c66817e9d7d
font_01_sfnt_off0000e71e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE71E 10584 bytes
SHA-256: 52c95fdb5f8db282126f9d731e22e893ad639302ecde789fa6c16d32aca4af18
font_02_sfnt_off00010b1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B1F 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176