Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7ddf91ba71fd3e6…

MALICIOUS

PDF

73.5 KB Created: 2021-03-12 21:47:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: d57c5e7ccbd91c32e5ad44d27ecea5f2 SHA-1: da41c528612b423311a588d913998503fdd10e1c SHA-256: d7ddf91ba71fd3e6dd4615c6d510517facd441eb3665c9514e2131d31e03c565
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The document body, though partially corrupted, suggests a lure related to fixing treadmill belts, which is likely a pretext to direct users to malicious external URLs. The presence of numerous external URIs, many hosted on disposable domains, further supports a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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 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://zajinet.ru/strik?utm_term=how+to+fix+a+treadmill+belt+that+won%2527t+move PDF link annotation
    • http://easterthjg.com/how_to_set_citizen_navihawk_blue_angels_watchp7v28.pdfIn PDF document text
    • https://cdn.sqhk.co/dabebasavus/Wii2igX/raropuxitazonizawezovus.pdfIn PDF document text
    • http://liko-sneakers.com/pewdiepie_tuber_simulator_hack_apk_max_level7s6pj.pdfIn PDF document text
    • http://xilibinebosapeg.mywebcommunity.org/36815927728.pdfIn PDF document text
    • https://cdn.sqhk.co/budotedo/j7ib1ja/sisepekezi.pdfIn PDF document text
    • https://cdn.sqhk.co/konafomaz/hhMjcx4/camp_island_gilford_nh.pdfIn PDF document text
    • http://taforojujutusig.mygamesonline.org/96739426548.pdfIn PDF document text
    • http://komaxinatobofe.medianewsonline.com/zuzawadupumikojaxa.pdfIn PDF document text
    • https://cdn.sqhk.co/segenapiza/jjgoGIA/15041169522.pdfIn PDF document text
    • http://tells.fun/zetuwulipo13gen.pdfIn PDF document text
    • http://monstergym.ru/93346280744i0suh.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/68dfc821-dc65-4d3c-92ed-bc04ec589496/hp_elite_desktop_beep_codes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2b8cc128-726e-41b1-ab1a-572fc8ea7d3d/22774033386.pdfIn PDF document text
    • https://ce83042b-5faf-46b5-bcbb-9b4d05ec7d33.filesusr.com/ugd/a31856_e2e0f2a9d5a94fb2a2e94e99dff925b8.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/5d4b96e0-6fa8-4388-8176-da80534b4db7/wordpress_redirect_user_to_specific_page_after_login.pdfIn PDF document text
    • https://7d6e376e-1ee3-4df5-88c1-8d1511d419f8.filesusr.com/ugd/7dd30d_0d9af93db213417f8ba15d472fd9b877.pdf?index=trueIn PDF document text
    • http://wugujub.onlinewebshop.net/apple_make_store_appointment.pdfIn PDF document text
    • https://696f1bd8-06c3-47a7-a8f7-e83e17ec8d18.filesusr.com/ugd/5ad03d_d14d5a8a249841528d39d4038c6bc2bf.pdf?index=trueIn PDF document text
    • https://932aa67c-856a-4fda-9fc8-fe3f50d4acc2.filesusr.com/ugd/a25eee_1a9fe232814246889b7676b3b35ac89e.pdf?index=trueIn PDF document text
    • https://c0b8f06b-4e98-4d3d-89ef-2f08caba629a.filesusr.com/ugd/0c8cc8_11bf68c403a6463ebc4d6ab6ef8ff07d.pdf?index=trueIn PDF document text
    • http://pojoviraxerojo.myartsonline.com/78559587933.pdfIn PDF document text
    • https://329f26c8-0235-4118-8622-173d264d9cf1.filesusr.com/ugd/221f3a_3062586a86584057a7c0a6f17b9ff7a2.pdf?index=trueIn PDF document text
    • https://810dce77-56ab-4324-823a-3549757f4eab.filesusr.com/ugd/1fad07_e14bf1ee1ed9405f91757dc4feb37120.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d50e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD50E 5112 bytes
SHA-256: 4bafec72cafbd1a5c3ae5ec8139b6b0aeecc0f7f524a297b6e014f610486e552
font_01_sfnt_off0000e65d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE65D 10300 bytes
SHA-256: 6458413539fbb11b9704bf79a3b03e2b95825f4511305a179e1dcdcf654eef4c
font_02_sfnt_off00010998.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10998 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230