Malicious PDF — malware analysis report

Static analysis result for SHA-256 c62d0ef084139049…

MALICIOUS

PDF

93.1 KB Created: 2021-05-18 08:50:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 0112264b6bd711f04c4e0f2e19f5e8c0 SHA-1: 50883cfdc938bc4e55e8628991f528eb278af29d SHA-256: c62d0ef0841390491649410dc8725c6c2335b6eeae52c4ef7af2e6842a6c0851
156 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 0.9991

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 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.
  • 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://kuzutuzo.ru/strik?utm_term=behringer+x+air+x18+driver+mac PDF link annotation
    • https://kuvikupomudu.weebly.com/uploads/1/3/4/4/134457818/8335366.pdfIn PDF document text
    • https://wedidosav.weebly.com/uploads/1/3/1/6/131637371/293926da59f.pdfIn PDF document text
    • https://kevelowomovozi.weebly.com/uploads/1/3/4/0/134012304/633579e48eac.pdfIn PDF document text
    • https://nupepapeziwib.weebly.com/uploads/1/3/5/3/135319604/jigikanuso_tejuxedud.pdfIn PDF document text
    • https://xonunate.weebly.com/uploads/1/3/4/4/134478107/7623810.pdfIn PDF document text
    • https://zutomufafet.weebly.com/uploads/1/3/1/6/131607254/vagefuba.pdfIn PDF document text
    • https://gusoberususot.weebly.com/uploads/1/3/1/4/131454899/9f46c99b8a39bd.pdfIn PDF document text
    • https://rategojo.weebly.com/uploads/1/3/0/7/130739688/6539885.pdfIn PDF document text
    • https://xiruzukigipimog.weebly.com/uploads/1/3/4/8/134865515/simipuxumuvafenij.pdfIn PDF document text
    • https://fibupodofakakov.weebly.com/uploads/1/3/4/4/134496100/zapufobazi.pdfIn PDF document text
    • https://mapazudisobamun.weebly.com/uploads/1/3/4/6/134604154/mugovokidotub-kamofizutigi-palometifagifa-jesepugus.pdfIn PDF document text
    • https://juwomazitebuden.weebly.com/uploads/1/3/1/4/131414743/mujopilefuboxuti.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/8c6143f4-c2cc-4721-8dd7-3fa52fb294e5/livuma.pdfIn PDF document text
    • https://s3.amazonaws.com/pajukovuxetu/kolajuxiwijul.pdfIn PDF document text
    • https://s3.amazonaws.com/ronatiduzoxij/chris_isaak_wicked_game_instrumental_mp3_download.pdfIn PDF document text
    • https://s3.amazonaws.com/zuponefi/nupivogumanubawuvanesiwet.pdfIn PDF document text
    • https://s3.amazonaws.com/jezekemunidup/change_button_color_onclick_in_android.pdfIn PDF document text
    • https://s3.amazonaws.com/kavalukato/23041450815.pdfIn PDF document text
    • https://s3.amazonaws.com/tomaxade/bifold_brochure_mockup_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9c726dfb-3774-4c48-bffa-469bfb05f6a9/how_and_why_did_fascism_rise_in_italy.pdfIn PDF document text
    • https://s3.amazonaws.com/nijosinizo/how_to_play_silent_hunter_3_on_mac.pdfIn PDF document text
    • https://s3.amazonaws.com/tinezedu/horton_hears_a_who_book_pages.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a5e65318-241d-4245-9c3d-b9f867448e02/how_to_calculate_molar_mass.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_off0001171b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1171B 5736 bytes
SHA-256: 0eb597a59b2195288f452b10b657131edf68ec75322ba70d430e5f40455b94f6
font_01_sfnt_off00012b33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B33 5564 bytes
SHA-256: 098be4873dbbf57c4c362667d17d8dca37f141b49a053aed176c20c1d5248015
font_02_sfnt_off00013e0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13E0B 11724 bytes
SHA-256: 605d99ebbaec154bd965a2df15b3617c6043f784327ea00f291449a4e6556a7d