Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed612c9ff063ac19…

MALICIOUS

PDF

79.1 KB Created: 2021-03-15 10:11:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 10d11fec68a3d04c19627349ab8889e4 SHA-1: 14d323ad727b2e6350998b46f16565431dc68665 SHA-256: ed612c9ff063ac19c527f6d026ff77114d72861f059e99df532c3f43de39daa0
186 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for PDF_SEO_LINK_FARM, indicating it's part of a link farm designed to drive traffic to various external sites. One of the embedded URLs, 'https://soxebez.ru/wix?keyword=watch+prometheus+online+free+stream', is presented as a lure for free movie streaming, a common tactic for phishing or malware distribution. The ML classifier and ClamAV detection strongly suggest malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://soxebez.ru/wix?keyword=watch+prometheus+online+free+stream PDF link annotation
    • https://jikunuxot.weebly.com/uploads/1/3/4/3/134315974/tulurozilafute.pdfIn PDF document text
    • https://wisejagu.weebly.com/uploads/1/3/4/8/134881465/dc8fe5e5777.pdfIn PDF document text
    • https://rebejudan.weebly.com/uploads/1/3/5/3/135316845/30d182c37.pdfIn PDF document text
    • https://guvemixekowarov.weebly.com/uploads/1/3/4/6/134686109/3423619.pdfIn PDF document text
    • https://cdn.sqhk.co/vilitemeru/h4jaEgh/14663807844.pdfIn PDF document text
    • https://cdn.sqhk.co/xavaxonad/jfT3BtM/tusatipabiwotiwotezosi.pdfIn PDF document text
    • https://cdn.sqhk.co/bosejadukifo/2i1iaja/60152045092.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/4ba82635-91fd-48c9-9da7-306463a056df/how_does_global_warming_affect_polar_bears_and_their_habitat.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/51b4b5d5-4c64-41ee-bac4-fb0f025c3cd9/tuesdays_with_morrie_quotes_about_feelings.pdfIn PDF document text
    • https://f6b99bba-f064-431f-ab68-6eacb91b2703.filesusr.com/ugd/35e1ce_ba58b01b6305494982ccedfc26feeeae.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/f8a4b1aa-2bc9-49a9-9eb7-ca2929506e02/85355185694.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/176fc480-0176-4d98-a8be-0784120e694c/68691132029.pdfIn PDF document text
    • https://f6180879-d31b-499c-8e42-fead7842c491.filesusr.com/ugd/007227_41e510e9f5e94cefaac48f70e0f2f7ef.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/cf0b018c-a520-4222-8adf-25c4706fb34c/divina_commedia_inferno_canto_v_parafrasi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/be1eb1f6-8bc8-4b8f-98c6-2fd1abc3cb4b/lugijezonupipa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ab0c8a62-e55b-4465-b35c-ea897c16d438/osha_standard_29_cfr_1926_subpart_l__m.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e026db36-1ccd-4733-8d3d-36c0792ca87a/pearson_realize_algebra_1_common_core_textbook.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c8c5c5cd-359a-4623-a993-bfb6ee25f408/37342805799.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/27e7f373-f51f-4667-95a8-bfb888c8235f/pevuxejoxosanidudokanimi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c982dcdc-4414-4df4-b5ea-bd77af95dae3/quadratic_equation_formula_steps.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bd8c80f1-97ed-4ec4-9af4-7a60344bd146/how_do_mountain_lions_adapt_to_their_habitat.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_off0000f7b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7B5 5268 bytes
SHA-256: 24b65d983fd6474c77c9dabe9fce24200c3a7aaffade41f8ea1df53a5b050674
font_01_sfnt_off00010980.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10980 11192 bytes
SHA-256: cd3162bdbd4e983dd71d9d81f58197523de3fc6f59b7fa5547686572d8f32cab