Malicious PDF — malware analysis report

Static analysis result for SHA-256 029ab254a88b8d29…

MALICIOUS

PDF

80.7 KB Created: 2021-06-06 08:46:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 503d332e2cb549645853a62a6d4e1ac1 SHA-1: 1605d72f6208a79534316a5070894d1f816b7152 SHA-256: 029ab254a88b8d29073ef513c6eb3f28b88476ebfc30b3cb5f8bef04590060db
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses an urgency-based lure. 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 0.9954

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.
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://philabc.ru/pbw?utm_term=hiccups+stop+your+heart PDF link annotation
    • https://wotuvinuvokotar.weebly.com/uploads/1/3/5/3/135330473/034365baae88.pdfIn PDF document text
    • https://bibawegosisuzu.weebly.com/uploads/1/3/5/9/135961680/zijinaxewejudutiki.pdfIn PDF document text
    • https://xilorufanil.weebly.com/uploads/1/3/0/7/130739938/9799480.pdfIn PDF document text
    • https://xomixowabegela.weebly.com/uploads/1/3/4/6/134694161/zonafanodudisexagofi.pdfIn PDF document text
    • https://bulasekujamur.weebly.com/uploads/1/3/4/3/134377464/40e9575.pdfIn PDF document text
    • https://kisofoga.weebly.com/uploads/1/3/1/3/131383553/f8c3b6366.pdfIn PDF document text
    • https://dugumali.weebly.com/uploads/1/3/1/4/131437411/wijakas.pdfIn PDF document text
    • https://remafubununabex.weebly.com/uploads/1/3/1/4/131437283/kejilixiv.pdfIn PDF document text
    • https://vekibapovadivoz.weebly.com/uploads/1/3/0/8/130873848/4773319.pdfIn PDF document text
    • https://soxiwavarado.weebly.com/uploads/1/3/1/4/131437421/9967378.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/6278e1f2-15bf-45af-9eb6-c3c702368ac6/best_ethical_hacking_course_online_free_in_hindi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/321df50f-a791-42e3-ad85-2516a6ffa197/48551851668.pdfIn PDF document text
    • http://junerew.pbworks.com/f/myers_briggs_personality_test_results.pdfIn PDF document text
    • http://funuvutidip.pbworks.com/w/file/fetch/144587298/pubg_mobile_ranking_system_points_2019.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ff17d288-e246-4027-b627-d745b390d8e4/electronic_devices_and_circuits_9th_edition_solution_manual.pdfIn PDF document text
    • http://gufabewa.pbworks.com/f/http_epicgames.com_2fa_aktivieren.pdfIn PDF document text
    • http://juvupumanut.pbworks.com/f/40358485116.pdfIn PDF document text
    • http://lomexalipele.pbworks.com/f/bepavoputubog.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9840eb43-4e24-41a4-abc6-5a1a1ec9f4c4/kemadodirisinijovapizopin.pdfIn PDF document text
    • http://lugozamuxika.pbworks.com/w/file/fetch/144564588/sims_4_pets_activation_key_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/13765c0a-c782-4e16-9ac3-fdb05813fd1d/baretuwewozanewuzujow.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c1b10129-b642-4e23-8c0e-10de4ecf0393/37592306892.pdfIn PDF document text
    • http://detomipipu.pbworks.com/w/file/fetch/144518391/bhagavad_gita_in_hindi_and_english.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/484e12ab-a61e-4192-a34e-5a7378f31f94/80640712197.pdfIn PDF document text
    • http://wasazejis.pbworks.com/w/file/fetch/144598128/77811508904.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/531653dd-d75e-4042-be05-4a5435317319/dizalikumuxevesita.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f4c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4C7 5052 bytes
SHA-256: c61fef5411393e33accdc1bfb35d7e6383ddb180bf72e60ce00cca7dc4de3747
font_01_sfnt_off000105f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105F0 2140 bytes
SHA-256: 49dddaa543544930169c80d10742cf71a10a90771d945bdf421e53748b1fa594
font_02_sfnt_off00010fca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FCA 10316 bytes
SHA-256: 4adef0dfa1b64a1450e529a246adac6bf1025e1a26d94e72f6192ff8dbf65cb5