Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ba0c9b713af8b42…

MALICIOUS

PDF

79.5 KB Created: 2021-02-18 06:22:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 99da14bf042c2be1ef72a0f57c259c78 SHA-1: 93d2427378a86f7dccf61673023c49036c77d5c8 SHA-256: 5ba0c9b713af8b42969d46764a7946e114e13ce4ec047300dc5951d98ed6634e
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-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.
  • 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://jottigo.ru/wix?keyword=flashback+2+delay+manual PDF link annotation
    • https://jubibesu.weebly.com/uploads/1/3/1/3/131379113/6190255.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444353/normal_600bb01a5954f.pdfIn PDF document text
    • https://cdn.sqhk.co/dufadafakuti/gcShhjb/how_to_get_hoverboard_ghost_simulator.pdfIn PDF document text
    • https://cdn.sqhk.co/fenazijeguk/eFWkgdO/download_telegram_x_for_windows_xp.pdfIn PDF document text
    • https://cdn.sqhk.co/loxusovi/ieTgihh/photo_lab_pro_picture_editor_apk_free.pdfIn PDF document text
    • https://cdn.sqhk.co/dubikewe/Zk2hg8l/mudurokinax.pdfIn PDF document text
    • https://cdn.sqhk.co/fubemabofof/gigcibK/music_video_maker_free_download_for_pc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408707/normal_5fd3db191f588.pdfIn PDF document text
    • https://cdn.sqhk.co/fafojipedul/OhegdYT/39240942866.pdfIn PDF document text
    • https://mavipevawifuduv.weebly.com/uploads/1/3/4/5/134598931/8833634.pdfIn PDF document text
    • https://wavikifetin.weebly.com/uploads/1/3/4/9/134901048/pekuvo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456989/normal_5fe850379d545.pdfIn PDF document text
    • https://tapukinag.weebly.com/uploads/1/3/1/6/131606864/wudeb_gibam_purikar.pdfIn PDF document text
    • https://cdn.sqhk.co/wuxaguzifep/bhci7QA/basketball_shooting_machine_price.pdfIn PDF document text
    • https://cdn.sqhk.co/fudamozomeb/cuBhfgc/guvalaxarabiwas.pdfIn PDF document text
    • https://zedabobosarafon.weebly.com/uploads/1/3/0/8/130813357/1159091.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4371258/normal_5fe42bd26150d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/kijelopazekune/xiwuxeguliwej.pdfIn PDF document text
    • https://s3.amazonaws.com/zunaduxa/subovalasodajomibalotev.pdfIn PDF document text
    • http://levapen.rf.gd/metropolitan_life_insurance_company_annuity__retirement_services.pdfIn PDF document text
    • https://s3.amazonaws.com/leteraxewe/54029835424.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_off0000fa26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA26 5476 bytes
SHA-256: 3e0db85cef902862dcd98be60cc997ad3ad107b42eb96fc75598358fb26040b6
font_01_sfnt_off00010caf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CAF 10708 bytes
SHA-256: 016e5ed971f1e52dedb87d993ad4c395a766d484a114d6017ea7146b300d32a1