Malicious PDF — malware analysis report

Static analysis result for SHA-256 2224111293c3d035…

MALICIOUS

PDF

79.9 KB Created: 2021-03-24 06:54:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: d842ec9e9ddd1376df6b0b19d8b42d27 SHA-1: 52dd644dc3840ece6a4164866425e4c4776a942a SHA-256: 2224111293c3d03527a6428febfb761bd49dbe47cb5628665a78be082169f114
186 Risk Score

Malware Insights

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

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 0.9997

Heuristics 6

  • 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 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.
  • 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/123?utm_term=ciena+6500-+14+datasheet PDF link annotation
    • https://cdn.sqhk.co/wojipezusax/d9givGx/97912189374.pdfIn PDF document text
    • https://cdn.sqhk.co/tuxonewebuke/ijcRidH/alien_runner_game.pdfIn PDF document text
    • http://peteferix.mypressonline.com/lotofik.pdfIn PDF document text
    • https://cdn.sqhk.co/pulisamog/IUDjbhh/download_mad_man_after_doomsday_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/kuwusemob/jathiji/tigesavezodavawazezodoju.pdfIn PDF document text
    • https://cdn.sqhk.co/lunexubafexo/3zie4jP/difference_between_archaebacteria_and_eubacteria_yahoo_answers.pdfIn PDF document text
    • https://xatefokagakutil.weebly.com/uploads/1/3/4/1/134108848/nixetof_rerasuzeg.pdfIn PDF document text
    • https://cdn.sqhk.co/dagosasojo/hjpjihe/zotawuzi.pdfIn PDF document text
    • http://zofugef.mypressonline.com/funciones_del_sistema_nervioso_central.pdfIn PDF document text
    • http://dakisemakegag.sportsontheweb.net/77353091942.pdfIn PDF document text
    • https://cdn.sqhk.co/nipigagavadu/ihcoxZl/corona_sdk_software_free.pdfIn PDF document text
    • https://cdn.sqhk.co/zipuzedozame/hiKhcid/russian_cars_priorik_2_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/fojupigek/he3Jyjd/chelsea_boots_formal.pdfIn PDF document text
    • https://cdn.sqhk.co/wupifufexix/o1W076O/rarewiluxifoxizepedofufar.pdfIn PDF document text
    • https://genigudepa.weebly.com/uploads/1/3/1/0/131070712/wiwofunejono.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://movasedumanepe.onlinewebshop.net/imax_b6_charger_cable.pdfIn PDF document text
    • http://bagugexasorip.myartsonline.com/67351750115.pdfIn PDF document text
    • https://c245485c-e1a4-4c5a-9a2a-c465a95e53c8.filesusr.com/ugd/25f824_de7b1bfb219a49efb1d977bb77149e56.pdf?index=trueIn PDF document text
    • https://6e8b94c7-278c-4a65-9c30-8d61c93a8f31.filesusr.com/ugd/9ff9b8_edfb05d809474818a290bf729aabbf8b.pdf?index=trueIn PDF document text
    • https://9cf93ecd-64ee-4ad6-afcc-f350577a7522.filesusr.com/ugd/c4dbd3_de8f4dedf52f44938400e62234c0b3eb.pdf?index=trueIn PDF document text
    • https://b3079848-b07e-4d89-9244-05dfa5dd91fe.filesusr.com/ugd/3ab5ed_6706996661d247b1bfb30ebe1577816c.pdf?index=trueIn 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_off0000fa4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA4D 5280 bytes
SHA-256: c0a7fac9375c327dcc12baecd5cdefac174e65535c85d5f9ed4105754110e2f2
font_01_sfnt_off00010c4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C4E 10760 bytes
SHA-256: fa5338af5a7da17e3f20e4ee31263499f3298e083c90aa8fa0ebfbfb974087fe