Malicious PDF — malware analysis report

Static analysis result for SHA-256 f6c54f54eac12add…

MALICIOUS

PDF

82.4 KB Created: 2021-04-08 22:12:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: d341fa2a65167211c3212de4ddb660f4 SHA-1: 1481cd0115eda66493ef3a090648f237dceac0f1 SHA-256: f6c54f54eac12add5f8e84a19a118b2265be57e497bf6ebe70a6a835ef695b5f
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9983

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://crophysi.ru/strik?utm_term=can%2527t+find+gps+signal+on+tomtom PDF link annotation
    • http://merimowufo.iblogger.org/materiales_inorganicos.pdfIn PDF document text
    • http://setokanekema.mygamesonline.org/82209624820.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388426/normal_601e4c3c4d844.pdfIn PDF document text
    • https://cdn.sqhk.co/doburazax/euhiiN9/fepesot.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369141/normal_5fe783a8301d7.pdfIn PDF document text
    • http://nebatomefov.scienceontheweb.net/kala_bhairava_stotram_in_tamil.pdfIn PDF document text
    • http://gebevojika.mygamesonline.org/6926732013.pdfIn PDF document text
    • https://cdn.sqhk.co/janurisu/idhdEQ6/moon_patrol_arcade.pdfIn PDF document text
    • https://cdn.sqhk.co/lamidipeke/jwjgij8/94166735345.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374853/normal_5feef27506a17.pdfIn PDF document text
    • https://cdn.sqhk.co/jovakuki/7Xjbjeb/day_r_survival_premium_apk_1._670.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458618/normal_601410ae46562.pdfIn PDF document text
    • http://fegivate.medianewsonline.com/que_hacer_cuando_te_sacan_muela_del_juicio.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/400c8ec8-08ac-4c15-8fe1-5e60cae877e5/what_are_the_types_of_cv_resume_look_like.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/138293a2-ebf1-45a2-b426-7eb20c7f35c4/que_le_hacen_a_un_cuerpo_en_la_funeraria.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ea5ebf4f-0816-4a7f-802b-346df3a9da34/skyrim_patch_1.9_32.0_8_crack_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/86c0c39d-41d0-4e95-bd9b-9bbefd52915f/hp_probook_6470b_bluetooth_driver_windows_10.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a8018732-68f5-452b-9ecd-963daca36d5f/karoxufafakadudobof.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f6f850ee-717a-4aee-9fcf-c3739a2ecbd1/aswb_exam_study_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3673b167-56a7-4934-aed4-b826af1ee19d/ritujumeguvuwopezuzed.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1853e9bf-eab6-41ff-8763-0743eea3e7c3/whered_you_go_bernadette_reviews_rotten_tomatoes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/edc1a692-a03a-407c-95e9-1a5b0f070961/rupugapoxesototimuwo.pdfIn PDF document text
    • http://povezemusugag.rf.gd/12810648800.pdfIn PDF document text
    • http://bodirinukamole.onlinewebshop.net/tutorial_photoshop_pemula.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eb7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB7D 2900 bytes
SHA-256: 68d094faf81d2ea9f62e68ee4e789e40b6192f27e323b9e50c58fbaa8f881837
font_01_sfnt_off0000f5c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5C0 4992 bytes
SHA-256: accf67f5d63c5195ea26e8fec3aa21906273b08cc8c214a0a4286cb5759ed03f
font_02_sfnt_off000106af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106AF 11724 bytes
SHA-256: 93e63da026719908ef658060fbf45804b542f002af96dfc34c96e627b647552e
font_03_sfnt_off00012d4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D4D 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3