Malicious PDF — malware analysis report

Static analysis result for SHA-256 012f2025360bda9f…

MALICIOUS

PDF

95.5 KB Created: 2021-05-03 13:43:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 4b1b98c1dd8d6f6476bf56253f231b28 SHA-1: 7dc8bf4e2d8c4a6350adefe0132f3472801ff2e2 SHA-256: 012f2025360bda9fd6c6c575ea8680928c598a4fe065ed196b55cc568cb67853
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO manipulation tactic. One of the primary URLs points to a domain associated with potentially malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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/strik?utm_term=dirk+gently%2527s+holistic+detective+agency+episodes PDF link annotation
    • https://gisogademumes.weebly.com/uploads/1/3/1/3/131379615/93515.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446174/normal_606d6444cf729.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448985/normal_5fd6a75b4b3b1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426941/normal_5ff0a09dd2321.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445736/normal_6027093f9a4f5.pdfIn PDF document text
    • http://xugememutan.iblogger.org/bedtime_story_1964.pdfIn PDF document text
    • https://zugozoriv.weebly.com/uploads/1/3/4/7/134770463/3874781.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446494/normal_603ce820cb5a5.pdfIn PDF document text
    • https://lipigilukezi.weebly.com/uploads/1/3/5/3/135347924/temukefik.pdfIn PDF document text
    • https://revugegan.weebly.com/uploads/1/3/4/6/134682990/1bd73aeab423b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417526/normal_5fe826185ec83.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366340/normal_5fe802e7c549c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4461509/normal_5fccfeddcaab8.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/4c5a6b3e-8c72-47be-958d-32d550ed9bc7/irregular_verbs_exercises_4th_grade.pdfIn PDF document text
    • http://dinukafewu.epizy.com/daxekekipabanifizo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/86f50ef9-ac9c-403e-8aef-dba9f7d893f5/what_does_usps_charge_for_insurance.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dc4b9eec-ebd2-4562-a17c-e8a619762096/tejerafoj.pdfIn PDF document text
    • http://kevawiposiwa.rf.gd/salawikain_at_sawikain_worksheets.pdfIn PDF document text
    • http://nerozufigepa.rf.gd/najepewuguw.pdfIn PDF document text
    • http://kovudefimure.rf.gd/78985098298.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/08f3ef40-08d0-426b-a9f1-65e082b7395a/jogumikotalapukiwa.pdfIn PDF document text
    • http://rigirulame.epizy.com/chadariya_jhini_song_pagalworld.pdfIn PDF document text
    • http://pumejak.rf.gd/45742475278.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ed361179-bc5e-4bf4-bd47-4c2555bf7082/dufunofuriwegisodok.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_off000134dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x134DC 5592 bytes
SHA-256: 0b08dfe26cdffd9c3430b88270f46e2977d6b6f83cd7657dc02e8dc6a785cd25
font_01_sfnt_off0001480c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1480C 11804 bytes
SHA-256: f6b11513c7d2d5b143cfdc304bfe11509b7927ab82b75cf09f5d1b40f97b3ce1