Malicious PDF — malware analysis report

Static analysis result for SHA-256 6667a91b22c50a5d…

MALICIOUS

PDF

81.6 KB Created: 2021-03-06 21:38:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: d0f466fcfffa95f496b1a26120107ca6 SHA-1: 35fbf314020aecdbafb492df86d128cf661a6198 SHA-256: 6667a91b22c50a5dcb8be347c6b73c3cb15c3e33f8f360b5cffff808a404c799
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded URLs pointing to potentially malicious domains, and ClamAV detection confirms its malicious nature. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a large number of links on disposable hosting, suggesting an attempt to distribute malware or phishing content. The presence of a 'download button' lure further supports the attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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 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://dugedepap.ru/wix?keyword=magisto+apk+crack PDF link annotation
    • http://accueilcmb.com/jixepemajijavvyo99.pdfIn PDF document text
    • http://webmastervlad.ru/hakkarim_net_101_indir_son_versiyonmor90.pdfIn PDF document text
    • http://marketop.club/the_book_of_jasher_chapter_14wcxnq.pdfIn PDF document text
    • https://mavepokakep.weebly.com/uploads/1/3/4/6/134628520/a03de3bb357d8d.pdfIn PDF document text
    • http://brumbum2.xyz/115516998963xe9v.pdfIn PDF document text
    • https://buluzuzumaz.weebly.com/uploads/1/3/1/6/131636727/natimisizotorenudago.pdfIn PDF document text
    • http://fabermanufacture.ru/2705428828zky5z.pdfIn PDF document text
    • http://girlsbeach.space/5629410563348pzo.pdfIn PDF document text
    • http://it50disconto.info/ncert_books_class_9_english_moments4h6p2.pdfIn PDF document text
    • http://wiregabjuk.fun/the_shape_of_things_to_come_movie_1936yrdww.pdfIn PDF document text
    • http://ita-fitness.fun/tools_and_equipment_used_in_technical_drawing3vnwl.pdfIn PDF document text
    • http://dawexefif.getenjoyment.net/power_book_2_ghost_cast_cane.pdfIn PDF document text
    • https://witaveju.weebly.com/uploads/1/3/1/4/131452735/fobelodutop_suvotedabokopux.pdfIn PDF document text
    • http://nefritthebestthing.site/81975993352tskoi.pdfIn PDF document text
    • http://pidagenavuziw.mywebcommunity.org/sowomatetepoxepi.pdfIn PDF document text
    • http://gratoraama.website/get_navigation_bar_height_androidjejvy.pdfIn PDF document text
    • http://lnstagramverificationbadge.com/how_to_use_the_bissell_little_green_proheat_turbo_brush3zi73.pdfIn PDF document text
    • https://vejiledulibona.weebly.com/uploads/1/3/4/3/134318828/5baa851bba509c.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/d29693aa-fc11-4ce6-9914-16843426b2f8/68651818218.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f609d520-fd06-4151-9bba-2170a0252fdc/pabisaxisiza.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/021cdd09-0669-4b41-bce5-15be72aa74d0/47466734541.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e35e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE35E 5136 bytes
SHA-256: d4d88afc0f4bcdd475a0bbd09de1a874cf472d06117f31678939c2ed6a49b5b7
font_01_sfnt_off0000f4f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4F4 2248 bytes
SHA-256: 8b88185fb1caa19b127db774f1e773b8ec41d1394bc7b72cd727186061f48d9d
font_02_sfnt_off0000ff47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF47 10468 bytes
SHA-256: 911b19311b9f3a83283ee58bb70db2631c20c85f8cf7db7d4c7b61f5a5ad5fe5
font_03_sfnt_off00012357.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12357 16204 bytes
SHA-256: 4224c139fdc5eb4d8d2f8f91bfbf26f5e1d5856c4fe14b992c7840fd4fd56b98