Malicious PDF — malware analysis report

Static analysis result for SHA-256 2dcb81b0e419fae3…

MALICIOUS

PDF

88.3 KB Created: 2021-03-30 17:01:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 9b5233c18e693f587c390d161d651539 SHA-1: 2bd3e1f1da60ca372b265b47b7e4d0a2dbcc8c85 SHA-256: 2dcb81b0e419fae38731b1162a124c27c0f689c84f48078191265ab326822605
186 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier indicating a high probability of maliciousness. The file contains a large number of external links, many pointing to disposable domains, suggesting a link farm or phishing attempt. While no scripts were explicitly extracted, the PDF structure and link farm indicate an attempt to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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 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://mezovuduw.ru/aws?utm_term=sharper+image+tv+wireless+headphones+manual PDF link annotation
    • https://cdn.sqhk.co/sawijewabob/bjhggOb/bounce_tv_channel_number_on_directv.pdfIn PDF document text
    • https://cdn.sqhk.co/sevafeluba/jgagghj/purofopezenokisujazuxo.pdfIn PDF document text
    • https://pupowoxixibigi.weebly.com/uploads/1/3/1/4/131438439/veruzofu-lusodaguxiluxix.pdfIn PDF document text
    • http://kosamaritaj.getenjoyment.net/xasubugapiwaluzopiwolif.pdfIn PDF document text
    • https://cdn.sqhk.co/wogirujut/jgBumgj/revue_starlight_re_live_facebook.pdfIn PDF document text
    • https://cdn.sqhk.co/remimidotomi/kuWKjhV/kitty_cat_story_cat_avatar_maker.pdfIn PDF document text
    • https://cdn.sqhk.co/kupulifip/jtcihgj/dimolifesej.pdfIn PDF document text
    • https://jezinuva.weebly.com/uploads/1/3/4/8/134869759/5456592.pdfIn PDF document text
    • https://cdn.sqhk.co/gebijowokobe/Jgcelif/shell_clubsmart_apple_wallet.pdfIn PDF document text
    • https://jixejuterekafiw.weebly.com/uploads/1/3/4/5/134508928/fonora.pdfIn PDF document text
    • http://pufivuziviv.mypressonline.com/xorinuzemetiginiliweluk.pdfIn PDF document text
    • https://cdn.sqhk.co/judawube/zg4gcSL/bass_booster_untuk_tube_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/tibakekavero/hbjgRge/guide_for_free_fire_diamonds_2020_new.pdfIn PDF document text
    • https://zoluwapipapak.weebly.com/uploads/1/3/5/3/135321816/jizezaf_sewofitik.pdfIn PDF document text
    • http://midikakuvekume.mywebcommunity.org/logitech_mk710_keyboard_user_manual.pdfIn PDF document text
    • http://dejepuzalew.mygamesonline.org/apocalypse_culture_2.pdfIn PDF document text
    • https://viledilexemapol.weebly.com/uploads/1/3/4/6/134698440/lovugo.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
    • http://gulagopafed.onlinewebshop.net/autocad_2020_print_to_3d.pdfIn PDF document text
    • https://s3.amazonaws.com/fajixe/blacksmithing_guide_wow_mist_of_pandaria.pdfIn PDF document text
    • https://s3.amazonaws.com/nilafafakem/4648357643.pdfIn PDF document text
    • http://rogomore.myartsonline.com/curso_cabala.pdfIn PDF document text
    • https://s3.amazonaws.com/nitizobuv/la_familia_de_pascual_duarte_pelicula_descargar_gratis.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_off00010ee6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EE6 5512 bytes
SHA-256: 68dd052b1942065050eca66404cb71c95ea099b535369b7e07cdb41434ceecb7
font_01_sfnt_off0001218d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1218D 10556 bytes
SHA-256: 982b0b8f5e719116bc3ea06736a9624fc8a25eb0f3bab1c6c95eea2f8454062a
font_02_sfnt_off0001458a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1458A 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3