Malicious PDF — malware analysis report

Static analysis result for SHA-256 3b39179fdb85987e…

MALICIOUS

PDF

76.7 KB Created: 2021-03-19 02:43:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 8df3b11c828965f4f9135172f289132e SHA-1: 25d76e58ba38a29fffe1b9a55543a5e7a5532573 SHA-256: 3b39179fdb85987e23af6b450e4b5e29efb902456553847884b18f45a4182190
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to disposable domains, indicative of a phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs are consistent with techniques used to redirect users to malicious sites, likely for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://mezovuduw.ru/wix?keyword=latin+america+test+study+guide PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4491152/normal_60034f22a3df5.pdfIn PDF document text
    • http://xemokajoled.medianewsonline.com/percy_jackson_2_streaming_film_complet_vf.pdfIn PDF document text
    • https://cdn.sqhk.co/nepelusir/OgdylDH/advanced_ip_scanner_windows_10.pdfIn PDF document text
    • http://idealica-ufficialeitalia.website/ragnarok_rush_acolyte_guideiegzd.pdfIn PDF document text
    • http://sumapewub.getenjoyment.net/chevrolet_owners_manual_free.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461485/normal_60242b9758538.pdfIn PDF document text
    • https://pejuloxekipural.weebly.com/uploads/1/3/4/4/134403187/a3f41.pdfIn PDF document text
    • http://itfamily.info/lanasepunumapivokedugabaerqjf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393901/normal_604d217d8fa19.pdfIn PDF document text
    • https://lewumime.weebly.com/uploads/1/3/5/2/135297270/603647331.pdfIn PDF document text
    • https://cdn.sqhk.co/vixukose/eigifib/weebly_ecommerce_by_square.pdfIn PDF document text
    • http://batmbatm.ru/do_pink_dye_test_have_evap_linescrjx3.pdfIn PDF document text
    • http://zuxuvikewi.sportsontheweb.net/4632858086.pdfIn PDF document text
    • http://atelier-spb.com/shark_ion_robot_reviews_720ijnb4.pdfIn PDF document text
    • http://aazzzry.space/just_dance_4_redeem_codeyfti1.pdfIn PDF document text
    • http://leninuludobodu.mygamesonline.org/information_security_risk_assessment_toolkit.pdfIn PDF document text
    • http://vowujebotoza.mywebcommunity.org/pixatoxasesiporaxipikobu.pdfIn PDF document text
    • https://bixuduserar.weebly.com/uploads/1/3/4/8/134861961/451639.pdfIn PDF document text
    • https://cdn.sqhk.co/kulobibab/JiaCicQ/pencil_boxes_bulk.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388818/normal_5fded5d671448.pdfIn PDF document text
    • https://cdn.sqhk.co/vujalenan/icx5obo/amazon_prime_video_cancel_my_account.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446170/normal_6016d3a7c6a86.pdfIn PDF document text
    • http://wamipivifubape.sportsontheweb.net/xarudanuvubumajuvowama.pdfIn PDF document text
    • https://zikibagegun.weebly.com/uploads/1/3/1/3/131398006/1216fda8600574.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nejimafalun.onlinewebshop.net/are_there_polar_bears_in_captivity.pdfIn PDF document text
    • http://gezixus.myartsonline.com/wotis.pdfIn PDF document text
    • http://bebovufuvuji.myartsonline.com/how_to_make_fire_extinguishers.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_off0000ed50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED50 5272 bytes
SHA-256: 8f3ca1349da8c1b20063bb6f909c17934bd17c28b10ae443bd3c79378e2da3dc
font_01_sfnt_off0000ff30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF30 11160 bytes
SHA-256: d41386f1c483385e5c73eb5ccaf0aa2c3a7f5bd4961471a28ee075569c68adbe