Malicious PDF — malware analysis report

Static analysis result for SHA-256 f751655365044b10…

MALICIOUS

PDF

71.2 KB Created: 2021-03-17 22:43:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 711566a59efbf14cb704203996f03421 SHA-1: 071bbd3c43604e9944fd4e43fd83a62c0ed317ec SHA-256: f751655365044b10565d5a3eb55733fd72da921bb0f46f760d3715403511a8ab
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with a primary focus on directing users to 'fokemale.ru' under the guise of 'ark ios hack'. Heuristics indicate this PDF is part of a link farm designed for SEO manipulation, and ClamAV detection confirms its malicious nature as a phishing trojan. While no scripts were directly extracted, the PDF structure and embedded links strongly suggest an intent to redirect users to malicious content.

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://fokemale.ru/123?utm_term=ark+ios+hack PDF link annotation
    • http://rivozuzeno.mywebcommunity.org/backlinking_seo.pdfIn PDF document text
    • https://fogurasetaj.weebly.com/uploads/1/3/5/9/135961985/wikurogupuf_tafop.pdfIn PDF document text
    • http://sijemogezabusa.sportsontheweb.net/what_is_a_computer_science_degree_used_for.pdfIn PDF document text
    • http://lozuzaragujeb.mypressonline.com/how_to_crochet_a_square_in_round.pdfIn PDF document text
    • http://wejaduz.mypressonline.com/xiteb.pdfIn PDF document text
    • https://vuzaruluweketex.weebly.com/uploads/1/3/4/4/134478477/1695593.pdfIn PDF document text
    • http://fuwijumazawad.mywebcommunity.org/wikidot_dark_souls_1_stats.pdfIn PDF document text
    • https://bekitatabegoze.weebly.com/uploads/1/3/0/7/130775701/34b481ce0.pdfIn PDF document text
    • http://mozobadijoba.medianewsonline.com/cephalocaudal_assessment.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366359/normal_602f20362868d.pdfIn PDF document text
    • http://xilenemivagola.mywebcommunity.org/tivuvatobunadamepu.pdfIn PDF document text
    • https://fotovotujipibar.weebly.com/uploads/1/3/4/2/134267097/wugutofa-piruxi-dumenevapodugid.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4502464/normal_5fcec02634f23.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/e7e2e1b8-2b24-402e-b8f4-833b973a11ae/android_development_for_beginners_udacity.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/294c28c0-6fe4-4da6-82eb-1f54aa7911a1/35952769600.pdfIn PDF document text
    • https://a80c0318-1640-4d50-a016-df037fc402b9.filesusr.com/ugd/895bef_2a2fc1b9f23f4c4da044e31d9cf8105b.pdf?index=trueIn PDF document text
    • https://ef9935f7-a918-44a1-999f-f1d50a45e4a7.filesusr.com/ugd/b463f2_86facd1b12e14cdaab76101a1a001d6e.pdf?index=trueIn PDF document text
    • http://kikukuvikato.myartsonline.com/8488637827.pdfIn PDF document text
    • https://08b4a39d-fa16-4eaa-91be-ae90003cacb9.filesusr.com/ugd/237bf7_c208dedf2b004b0fba3b1fe5bd011d5b.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/118937cd-cc06-463d-b700-2ab09fd2029d/how_much_are_diecast_cars_worth.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3768b70d-f27d-46f9-b470-0ce0261a81b1/o_praise_his_name_chords_key_of_g.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e1dc2e2f-98f9-400a-b4d1-66e39bec5b9d/xafon.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_off0000daa1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAA1 4908 bytes
SHA-256: 35c26ec11b1d616993c1ac3656630b80aa38ed00f95f9f16484fbac06c0f57a8
font_01_sfnt_off0000eb51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB51 10732 bytes
SHA-256: b257e20debef8f787feac3b71061194ac8455f23bbd87ee2142fe73c2c0bdf0a