Malicious PDF — malware analysis report

Static analysis result for SHA-256 a9a35e21d57bcc74…

MALICIOUS

PDF

80.4 KB Created: 2021-03-22 20:49:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 3cc92518d8f06da9a3fe9fe7867b0fa8 SHA-1: 0c517b21742d4157dc52da40cd5f43eeccbe6a8e SHA-256: a9a35e21d57bcc746affcb04c7bbd61facca062b74ec9bb2a46b92b2c35adfda
214 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many of which are flagged as malicious or part of a link farm. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK specifically identifies a link to dafemum.ru as a known malicious redirector. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://dafemum.ru/award?keyword=file+pdf+kh%25C3%25B4ng+in+%25C4%2591%25C6%25B0%25E1%25BB%25A3c+l%25C3%25A0m+sao In PDF document text
    • http://vivadoctor.ru/kosewojujituwufojalivurcl1hx.pdfIn PDF document text
    • http://blue-tick-central.com/kinekeknm3x7.pdfIn PDF document text
    • https://cdn.sqhk.co/rubupidorinu/gj4iahc/stickman_vs_zombies_hacked_download.pdfIn PDF document text
    • https://cdn.sqhk.co/waxolulum/PMjdyJq/79804900856.pdfIn PDF document text
    • http://mulawejotili.iblogger.org/96562252384.pdfIn PDF document text
    • http://eferevole.com/anydvd_crack_8.3bd875.pdfIn PDF document text
    • http://psychologyrelax.xyz/fingerstyle_guitar_free_downloadshxhxz.pdfIn PDF document text
    • https://solugelefeko.weebly.com/uploads/1/3/0/7/130740562/nekanesabatisajemal.pdfIn PDF document text
    • https://cdn.sqhk.co/savunowudob/gcmjcKT/beer_pong_movie_scene.pdfIn PDF document text
    • https://cdn.sqhk.co/luwesefizi/jhgOgeU/glyphosate_herbicide_for_sale.pdfIn PDF document text
    • http://japavizifovot.22web.org/small_business_management_an_entrepreneur_s_guidebook_8th_edition.pdfIn PDF document text
    • https://fawurefo.weebly.com/uploads/1/3/4/4/134441885/vatavemovoxukam-wijulixolibaj.pdfIn PDF document text
    • http://gdztut.com/180965430094amg3.pdfIn PDF document text
    • https://sulogaxelope.weebly.com/uploads/1/3/1/4/131438888/lijozefed-vemuletemabo-bovinofubojaj-pimomoziterev.pdfIn PDF document text
    • https://cdn.sqhk.co/numobelez/NihPicz/17253895223.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/limewub/costain_group_annual_report_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/vovopafubipu/lumanevodebuwoga.pdfIn PDF document text
    • https://s3.amazonaws.com/ximupuv/45328409106.pdfIn PDF document text
    • http://fazajupozapufo.rf.gd/sewikuxitarut.pdfIn PDF document text
    • http://kojosire.epizy.com/caderno_encargos_sudecap.pdfIn PDF document text
    • http://falufobi.epizy.com/autacoides_farmacologia.pdfIn PDF document text
    • https://s3.amazonaws.com/wupuxus/soccer_drills_with_cones_and_ball.pdfIn PDF document text
    • https://s3.amazonaws.com/tosego/r_g_n_m_long_form.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_off0000fa3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA3D 6316 bytes
SHA-256: ccf118575781197688ac3cd300fbbe3e851f52355c84b9b80ecf7462b9c398f6
font_01_sfnt_off00010e92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E92 10548 bytes
SHA-256: 4283cfffed8a7524837a6b4b5df9e12dadac87e9b3de7a04a1360d6f3b06cec4

Open this report in the interactive analyzer, or submit your own file for analysis.