Malicious PDF — malware analysis report

Static analysis result for SHA-256 608866334e5274a5…

MALICIOUS

PDF

102.4 KB Created: 2021-05-15 17:43:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 42c08c07f92b3aadea72d1f518bc3c67 SHA-1: feb5c0fcdb2cf2a61c52902de25f6991d6efc62b SHA-256: 608866334e5274a56d1774a7570f4c8d239dd6794482b0a34e30116a9920e7c8
126 Risk Score

Malware Insights

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

The PDF contains multiple external URIs and is flagged by ML and ClamAV as malicious, specifically as a phishing trojan. The document body, though heavily obfuscated, appears to contain a lure related to gaming controllers, directing users to a suspicious URL. The presence of embedded JavaScript, though not directly analyzed for specific actions, contributes to the overall malicious nature of the document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://gimoguvi.ru/strik?utm_term=can+i+use+ps3+controller+on+ps4+pro PDF link annotation
    • https://cdn.sqhk.co/xibetevoxaj/jjd3ieA/us_navy_military_ranks_in_order.pdfIn PDF document text
    • http://ukrinsure.com/mutants_and_masterminds_character_sheet_2nd_editionw91pc.pdfIn PDF document text
    • http://trujillostacoshop.com/ziserigosaefe26.pdfIn PDF document text
    • http://chambre.xyz/word_riddles_and_answersqqn6t.pdfIn PDF document text
    • http://wordwild-store.com/how_much_does_a_50_flat_screen_tv_weighmtu03.pdfIn PDF document text
    • http://rawenspant.online/46981521665u3gf7.pdfIn PDF document text
    • http://dress-russia.ru/highland_cathedral_sheet_musicz65m5.pdfIn PDF document text
    • http://idealslimitaly-official.site/80971412932aj46y.pdfIn PDF document text
    • https://cdn.sqhk.co/purawewus/hgQ87Mg/92645187352.pdfIn PDF document text
    • http://umdtheatre.ru/hp_hewlett_packard_33120a_manualg5hsm.pdfIn PDF document text
    • http://fullpisetc.ru/how_to_get_cosco_high_chair_cover_off6qkdj.pdfIn PDF document text
    • http://thesalle.xyz/44484637365mefj7.pdfIn PDF document text
    • https://cdn.sqhk.co/moxulofilose/RhfjHgz/abc_tv_guide_australian_story.pdfIn PDF document text
    • http://twenty-promo2020.ru/4934527619281u76.pdfIn PDF document text
    • http://merishwheelrecords.com/vawusogudezezanejlvuh.pdfIn PDF document text
    • http://50offshop.pro/64537400139r10dz.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://ba739632-11db-41f7-a023-683a20e55d36.filesusr.com/ugd/99835b_c4075432c39d434497727dfbe5caae34.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/0e4cd296-4790-4b05-8a34-bf186f5e09f0/dd_5e_dungeon_master_tools.pdfIn PDF document text
    • https://8f1c0ae7-1ba6-4c51-a623-4d29f5e3aebb.filesusr.com/ugd/c1615c_ee24315f0cce4dbda4cf7dea4228fd6a.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/b438657b-344e-4cac-8761-193aefb63302/goat_simulator_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/33898b1d-9a86-47d4-9a28-cb26b1e88934/how_to_calculate_mixing_ratio_of_paint.pdfIn PDF document text
    • https://bf808793-8b46-4c54-8b11-319763181fa0.filesusr.com/ugd/0d018b_02097a2009a040b2b6f3f486071f93db.pdf?index=trueIn PDF document text
    • https://299bc67c-4c9a-44ea-852c-18f2d39dca40.filesusr.com/ugd/954c8b_6e442d4d090a4b579a1cdcebff485cd8.pdf?index=trueIn 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00014158.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14158 4288 bytes
SHA-256: a7c32720a5440fe4dfeec01860eb5f4536d451431f89724d1aad6e27611361c1
font_01_sfnt_off0001506f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1506F 5084 bytes
SHA-256: 454600aaa349528f8bed64b1a54d8a8444561c6ff4bf30fffb12839eba4890f3
font_02_sfnt_off000161ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x161CA 12316 bytes
SHA-256: 80cb997f9564ceef0be4ce3799b7552bb83175604e7110c625b0f623990bdeee