Malicious PDF — malware analysis report

Static analysis result for SHA-256 adb7213f669851cb…

MALICIOUS

PDF

92.6 KB Created: 2021-04-09 22:55:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: d2ae3c0d0944feff681bb09e5232e538 SHA-1: b857e8f6e224eeff8c836297f53bf774a63c00f5 SHA-256: adb7213f669851cb2f49541b7b267a0a8169c4adced10fe3d8473f7f8d9e9d82
126 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. It contains numerous external URLs, with one prominent URL pointing to a 'value investing course' which is likely a lure. The PDF structure and embedded URIs suggest it is intended to redirect users to potentially malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://soxebez.ru/strik?utm_term=value+investing+course PDF link annotation
    • http://storezone.info/uft_retroactive_pay_scheduleitery.pdfIn PDF document text
    • http://zovitidagawas.sportsontheweb.net/86509294839.pdfIn PDF document text
    • http://gejikojaki.scienceontheweb.net/vozazugijikutobudato.pdfIn PDF document text
    • http://werenntaq.online/what_are_the_basic_symbols_used_in_technical_drawingtvhme.pdfIn PDF document text
    • http://tivuximuliku.mygamesonline.org/up_deled_syllabus_2020_18.pdfIn PDF document text
    • http://sunazeremitiwu.mypressonline.com/bibif.pdfIn PDF document text
    • http://fovoxarofej.getenjoyment.net/breathing_under_water_richard_rohr.pdfIn PDF document text
    • http://dabukim.mygamesonline.org/how_to_read_a_graphic_novel_lesson_plan.pdfIn PDF document text
    • http://powerpoint4you.ru/52258402349nojnv.pdfIn PDF document text
    • http://vavazexowupex.medianewsonline.com/management_of_acute_myocardial_infarction.pdfIn PDF document text
    • http://pinerapidsrr.com/16948268381eehpw.pdfIn PDF document text
    • http://fesotisifofil.mygamesonline.org/schneider_electric_acti_9_catalogue.pdfIn PDF document text
    • http://mozobadijoba.medianewsonline.com/87685042671.pdfIn PDF document text
    • http://sewatumafuta.medianewsonline.com/technical_drawing_applications_icse_board_paper_2017.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/14441956-c641-4d70-8ea5-5b5866e000a9/vigedatita.pdfIn PDF document text
    • https://b585a76b-fab5-4024-b0d2-f3ad95444197.filesusr.com/ugd/404203_db7490f09b90440c8bb412c41873c06f.pdf?index=trueIn PDF document text
    • http://litorow.myartsonline.com/os_cinco_p_do_marketing.pdfIn PDF document text
    • https://af431a04-9ebc-4ea4-a98d-45e4ffbfad14.filesusr.com/ugd/485053_b7d94ae8bb5a49b99cb5d68c3ab78655.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/6254082e-dc56-4b86-ba1e-2047d3622914/tecumseh_engines_8_hp_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c3496818-89b8-4963-8863-096b661bc5dd/how_to_use_jitterbug_fishing_lure.pdfIn PDF document text
    • https://0c2a99dd-71fd-4a0d-b96f-672cfa785c21.filesusr.com/ugd/515c54_2737f4b014984b54b0c6c2079ebf1298.pdf?index=trueIn PDF document text
    • https://a1f0096d-76f5-425c-b826-5ccbd312c1bc.filesusr.com/ugd/8f8c07_bdb22217fb834e7ea0b021593b5cf6e9.pdf?index=trueIn PDF document text
    • https://c788b29d-df2d-4d46-9946-349e8cce89b7.filesusr.com/ugd/a9e086_0a33746fcd884215b425f56312a3a0cd.pdf?index=trueIn PDF document text
    • http://zaxuzut.atwebpages.com/sufotig.pdfIn PDF document text
    • http://zuputes.atwebpages.com/85489412396.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_off00012da1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12DA1 4992 bytes
SHA-256: f515c15fd76f7ac0f2068d0e3909c6e98432e51413b8f2e0312cb856b1670d1f
font_01_sfnt_off00013eb1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13EB1 11204 bytes
SHA-256: 11650b234d6e6fd8c00d8721a0670e9d5cac75c6129f5852e4621620834c906f