Malicious PDF — malware analysis report

Static analysis result for SHA-256 17c8cd9e5ad61bfb…

MALICIOUS

PDF

83.9 KB Created: 2021-04-29 21:47:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1130ae5d95a3d54a003d7967478f735f SHA-1: e9e62238aecae340e28261404f89cef541840287 SHA-256: 17c8cd9e5ad61bfb3bdbcc95eb4dcab32de37b1bf8760066efe5f3e111ea5370
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, many of which are part of a link farm, and one specific URL is presented as a lure related to 'The Magicians season 5 episode 3 watch online'. ClamAV and ML classifiers also flagged this PDF as malicious, specifically as a phishing trojan. The presence of embedded JavaScript, though not explicitly detailed in the provided evidence, is a common technique for PDF-based malware to execute malicious actions, such as redirecting users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://seumenha.ru/strik?utm_term=the+magicians+season+5+episode+3+watch+online
    • https://cdn.sqhk.co/fanabezom/4Ojhsur/62000513911.pdf
    • https://cdn-cms.f-static.net/uploads/4454682/normal_602260ec366ff.pdf
    • https://cdn.sqhk.co/rinulazopun/jbnvAOm/allotment_association_template_constitution.pdf
    • https://cdn.sqhk.co/libegavezu/N5iigfG/jikinenedusapulu.pdf
    • http://bobujopolodusol.mygamesonline.org/multiplication_and_division_of_algebraic_fractions_worksheet.pdf
    • https://cdn-cms.f-static.net/uploads/4470205/normal_60501fd913de9.pdf
    • http://fesunasisodenod.getenjoyment.net/kt_tape_ankle_stability.pdf
    • https://static.s123-cdn-static.com/uploads/4475196/normal_5fef6b0d5f7c1.pdf
    • https://cdn-cms.f-static.net/uploads/4376856/normal_605c39af1c487.pdf
    • https://cdn.sqhk.co/fedovipawe/l7jd3nt/zombies_war_doomsday_survival_simulator_games.pdf
    • https://cdn.sqhk.co/riwaxagi/jdggWqZ/koaa_smi_live.pdf
    • https://cdn-cms.f-static.net/uploads/4455673/normal_6056c84a1d9b5.pdf
    • https://static.s123-cdn-static.com/uploads/4422135/normal_5fdcbe7e14c92.pdf
    • http://pevazaw.mypressonline.com/mecanismo_de_accion_de_los_aines.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://486bfeb6-87d8-40a3-812f-3449909c9139.filesusr.com/ugd/81b904_1d239466f5b647eb9e11951c3a4a2743.pdf?index=true
    • https://4b5f4e46-8b81-4257-bf39-61fc08ba57b0.filesusr.com/ugd/7ea8bb_53bc9b0a573644be88388d8c4698d853.pdf?index=true
    • https://uploads.strikinglycdn.com/files/67c3f7ae-938b-40f2-8444-15314806ff88/8295954104.pdf
    • https://uploads.strikinglycdn.com/files/36d282aa-4ee9-41ca-8b54-aa3654e4fca7/wijowomutekuva.pdf
    • http://pimoxonevuwewax.atwebpages.com/26618473447.pdf
    • https://uploads.strikinglycdn.com/files/f7713f47-7d34-4bf8-ade0-7d2d41e40865/advantages_and_disadvantages_of_direct_teaching.pdf
    • https://d1b33a7b-cde1-45d4-bc15-d4d3b6236ac5.filesusr.com/ugd/1d64af_d1c6740baf2b4f1da8e6298c14075582.pdf?index=true
    • https://uploads.strikinglycdn.com/files/a8dc2a0e-4d3e-47ef-8373-cecfe6971ab4/zuzorajoturifi.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010595.bin
05af0c9fe5bc53ee3fb0f246d24c69b61fec96f4f00c06a09f8f7baf718b2b21		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10595 5720 bytes
font_01_sfnt_off000118fb.bin
190ebd66a365782d29964d549e02861e392d93a48f132570b564d1da10c6c33d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x118FB 11604 bytes

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