Malicious PDF — malware analysis report

Static analysis result for SHA-256 14841745355b792b…

MALICIOUS

PDF

69.8 KB Created: 2021-04-29 14:18:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 3c947bacaf2c8d1b5ad6d5a2659986ff SHA-1: ca3f910e24cbcacb3c2c4d9025515c372e6031a3 SHA-256: 14841745355b792b3c0797296fc423337d74f70506ab6cfab43e3b63d38014a3
226 Risk Score

Malware Insights

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

This PDF file exhibits characteristics of a phishing lure, specifically a payment redirection scam. It contains a large number of external links, many hosted on disposable domains, designed to redirect users to potentially malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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 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.
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • 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://druttle.ru/strik?utm_term=consew+226+parts+list PDF link annotation
    • https://cdn.sqhk.co/dedogupazib/3gigcPM/47244529287.pdfIn PDF document text
    • https://cdn.sqhk.co/vobevufubito/oe2ghge/digital_marketing_consultant_salary_nyc.pdfIn PDF document text
    • https://cdn.sqhk.co/doxowite/i7sVIjh/basketball_goal_installation_kansas_city.pdfIn PDF document text
    • http://lulopoboxefon.scienceontheweb.net/atmos_clock_repair.pdfIn PDF document text
    • http://ratixopawem.mypressonline.com/cancer_espinocelular.pdfIn PDF document text
    • https://cdn.sqhk.co/velujuvaxal/f1Chdx9/nevutafumoxadobozinopo.pdfIn PDF document text
    • https://cdn.sqhk.co/wesuwajil/hJgfhdA/vanizezasipevir.pdfIn PDF document text
    • https://cdn.sqhk.co/sevigexew/IxieUN2/deer_hunter_2018_game.pdfIn PDF document text
    • http://fuzuwozozat.mypressonline.com/biogenesis_theories_of_life_s_origin.pdfIn PDF document text
    • https://cdn.sqhk.co/kavejufa/5jjgffa/gubukuvajafemu.pdfIn PDF document text
    • https://cdn.sqhk.co/doporaba/2gjDjge/wekonapijumosowetasufu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://4ac36a2f-1533-488b-b282-cf34cdace458.filesusr.com/ugd/bcfc12_ef01f779265e4c6ab7d51dd1178b82ef.pdf?index=trueIn PDF document text
    • https://357b8bef-7330-4cfe-b31d-389db25c4d5a.filesusr.com/ugd/4c76bf_3e4def06f55c407d85c9bc98b4518f24.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/adbf998f-da25-47ad-9909-777ef90a329f/chicago_manual_of_style_17th_edition_citation_example.pdfIn PDF document text
    • http://gepafelixadu.onlinewebshop.net/gekojodagararafenara.pdfIn PDF document text
    • https://s3.amazonaws.com/siwixomudit/how_to_charge_phone_with_aa_battery.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a2de2762-bb5b-448d-99db-4aad43ccf55d/the_medium_is_the_message_book_review.pdfIn PDF document text
    • https://s3.amazonaws.com/rawesaragegugar/driver_bematech_lr2000e.pdfIn PDF document text
    • https://72858ab8-d36f-4bc2-b208-e5ec56e76d01.filesusr.com/ugd/3a4e0e_f3400136f9fd4f0393e8158faa2c471c.pdf?index=trueIn PDF document text
    • http://lewomunenuvi.myartsonline.com/68089168186.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_off0000d3c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3C7 5096 bytes
SHA-256: 5e6a6d0bf97b41265b6341a5d38817f0292743e92f641ea9a9ff3b530554c912
font_01_sfnt_off0000e537.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE537 10776 bytes
SHA-256: 24382b205d23c05222c4187a374c195398d06a01d7d19939754dffd21a7abeb1