Malicious PDF — malware analysis report

Static analysis result for SHA-256 6014d2c22659b06f…

MALICIOUS

PDF

76.4 KB Created: 2021-03-04 16:14:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 4c3c51da349a090fe38263f86dcb6963 SHA-1: 94b1c74bc9b1911b4e38178a85c4127aea79bd80 SHA-256: 6014d2c22659b06ffd782cdb93ba0b3b07daa77c337e8df7296122655863b598
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an external URI pointing to 'soxebez.ru', which is likely a malicious domain used to host phishing content or distribute further malware. The document body, though heavily obfuscated, contains references to 'wkhtmltopdf' and a date, suggesting it was generated programmatically to appear as a document. The presence of embedded URLs and the 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic indicate a deliberate attempt to direct users to external, potentially harmful, resources.

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 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://soxebez.ru/123?utm_term=attack+on+titan+season+4+trailer+explained PDF link annotation
    • http://fexuvukenix.22web.org/college_algebra_midterm_cheat_sheet.pdfIn PDF document text
    • http://wonder-ita.fun/vugenhvraj.pdfIn PDF document text
    • http://eslivdrug.space/ccleaner_professional_full_version_gratiszheon.pdfIn PDF document text
    • http://mkr-olimp.info/sentinels_of_the_multiverse_luminaryz2ym5.pdfIn PDF document text
    • http://lorakuze.sportsontheweb.net/18658657132.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/sajezife/movedarivizazegadiruto.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e10b4a52-3abb-4b4b-8e33-285fe174bd62/tokyo_ghoul_re_call_to_exist_characters.pdfIn PDF document text
    • http://rijewetevoxo.rf.gd/77128401361.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e103ca68-dd6f-48f6-95cf-2bf1dec8d88d/29073032499.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/484d4c74-784a-46c5-a7d9-b877be16d089/10633458968.pdfIn PDF document text
    • http://saxodanokijaj.atwebpages.com/1360247004.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/76bef8bc-c53a-4f4d-9a99-570f564c3626/skilsaw_5275_circular_saw_manual.pdfIn PDF document text
    • http://sukokovevaz.atwebpages.com/i_am_a_man_lyrics.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/08e85793-9746-4464-affc-a351bf879c5c/sports_illustrated_magazine_cover_size.pdfIn PDF document text
    • https://s3.amazonaws.com/nuselufuzo/lutomowukuxutu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7ce3dbf5-039c-4bf9-8dc2-18211c0a6459/what_is_the_definition_of_thermal_conductivity_in_science.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_off0000ee6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE6F 5276 bytes
SHA-256: a9f88d40bcdd650d31cac2969c1f449f7068a95f719329bf25dac9d1ec5b09d4
font_01_sfnt_off00010078.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10078 10376 bytes
SHA-256: 21b4c70b271c267f17c642ded7b4757a60fdd3820b77baa7e385ce5936c52861

Open this report in the interactive analyzer, or submit your own file for analysis.