Malicious PDF — malware analysis report

Static analysis result for SHA-256 18710f0f33b94b30…

MALICIOUS

PDF

71.7 KB Created: 2021-02-25 01:51:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: 4fede6655d04f106b95dc3865d10c452 SHA-1: 00979e6b1ee5c6aecd5dd191d2854140daa76905 SHA-256: 18710f0f33b94b30a66ce9d817e787f9a3f6a7e719cbe1ffcf7c9c437f14df45
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://baarspo.ru/wix?keyword=unblocked+games+99+minecraft PDF link annotation
    • https://cdn.sqhk.co/wepunajexiju/aLYl2MF/hachi_hachi_ashdown.pdfIn PDF document text
    • https://zogoporev.weebly.com/uploads/1/3/1/3/131381602/zaxinabutiv.pdfIn PDF document text
    • https://cdn.sqhk.co/nupegefozub/e7hhfgi/piano_game_online_play_4j.pdfIn PDF document text
    • http://mumolazesinidix.getenjoyment.net/jixovabakanaguxakusogojo.pdfIn PDF document text
    • https://rodinesupogoj.weebly.com/uploads/1/3/1/3/131384539/d6c4277cb5400ae.pdfIn PDF document text
    • http://komaxinatobofe.medianewsonline.com/shadowrun_weapons_guide.pdfIn PDF document text
    • https://cdn.sqhk.co/molavagew/hgmgdhb/wuzafexomerodivavixibej.pdfIn PDF document text
    • https://cdn.sqhk.co/vivutazawi/IjfCpfl/68993288843.pdfIn PDF document text
    • https://lurexiji.weebly.com/uploads/1/3/4/5/134594132/3354117.pdfIn PDF document text
    • http://gejudoxe.mypressonline.com/71459054190.pdfIn PDF document text
    • https://cdn.sqhk.co/fewukise/Tjjbjam/city_construction_simulator_forklift_truck_game_download_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/nuzinirumawe/v8Addhd/unmount_external_hard_drive_windows_10.pdfIn PDF document text
    • https://gakujoxabusu.weebly.com/uploads/1/3/5/3/135394689/penibadem.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000de16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE16 5692 bytes
SHA-256: 436c4295d078f4c385218fda88df7c03ab0eb65accf5e66df141a64aa53d54ee
font_01_sfnt_off0000f15b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF15B 9684 bytes
SHA-256: 92f0ac875242dee322098f9e989ca9c23d35c2f3a848bd5540282f612e490861