Malicious PDF — malware analysis report

Static analysis result for SHA-256 46956821fe1b4963…

MALICIOUS

PDF

82.3 KB Created: 2021-03-21 22:56:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: abc6e06366838d3bc14670205c120c9a SHA-1: 4e14aed4b05b8f21d8b3f1746bf80b86364a9d16 SHA-256: 46956821fe1b4963424f580560172dd33ea150b24116cb811716772362b3758c
226 Risk Score

Malware Insights

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

This PDF document is classified as malicious and exhibits characteristics of a link farm, with numerous external URLs embedded within its content. The heuristic 'SE_PAYMENT_REDIRECT_LURE' suggests a potential attempt to trick users into believing there are changes to payment instructions, a common tactic in business email compromise. While no scripts were directly extracted, the presence of many external links, some on disposable hosting, indicates a likely intent to redirect users to malicious websites or phishing pages.

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.
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise 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://leonvi.ru/award?keyword=math+for+machine+learning+book+pdf PDF link annotation
    • https://tisirobe.weebly.com/uploads/1/3/4/6/134699904/6e8ee.pdfIn PDF document text
    • http://gogemupiru.22web.org/fakegutapigonavajebexojij.pdfIn PDF document text
    • https://kodetinerimaguw.weebly.com/uploads/1/3/5/3/135347088/rekop_zorigeg_litusupuvilupar_sidizelukumiga.pdfIn PDF document text
    • https://vunisanelebori.weebly.com/uploads/1/3/3/9/133999195/nuninusabinati.pdfIn PDF document text
    • https://jonimewogil.weebly.com/uploads/1/3/1/8/131860125/jimuwipamidu_texodagab_fesivip_lemosilu.pdfIn PDF document text
    • https://fikijumosoliz.weebly.com/uploads/1/3/5/4/135400707/5391394.pdfIn PDF document text
    • https://xolipesu.weebly.com/uploads/1/3/4/6/134672505/suvinasukojo.pdfIn PDF document text
    • https://kigolakelo.weebly.com/uploads/1/3/1/3/131380934/nedala.pdfIn PDF document text
    • http://zikemipirelojo.22web.org/maplestory_m_phantom_weapon_guide.pdfIn PDF document text
    • https://fexaxotira.weebly.com/uploads/1/3/5/4/135401388/gisujorozex.pdfIn PDF document text
    • https://tebideronapiza.weebly.com/uploads/1/3/1/4/131483209/3454616.pdfIn PDF document text
    • https://gipurafesab.weebly.com/uploads/1/3/1/6/131637457/berekiji.pdfIn PDF document text
    • https://rasajelisulozin.weebly.com/uploads/1/3/1/6/131637016/jalazo.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/sifawekujiki/what_are_coso_controls.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1be56f6e-a00a-4a60-8345-55eddb0f3a08/joystick_logitech_g_saitek_x52_pro_flight_control_system_usb.pdfIn PDF document text
    • http://jefelaxe.epizy.com/49244690234.pdfIn PDF document text
    • http://bixikaw.epizy.com/1994_yamaha_timberwolf_250_carburetor_rebuild.pdfIn PDF document text
    • https://s3.amazonaws.com/xafaxotaful/15497472417.pdfIn PDF document text
    • https://s3.amazonaws.com/guvovigo/node._js_in_action_book.pdfIn PDF document text
    • https://s3.amazonaws.com/zedudo/serimez.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b250555f-a0c8-435f-8740-24449dcfa205/vowoxojogibagobipalaferif.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_off00010439.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10439 5600 bytes
SHA-256: 9e9554c33a2ab628ec63a157b1410a9ac56d8d2a5c096f01e7f71a2fa5031007
font_01_sfnt_off00011724.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11724 10776 bytes
SHA-256: a66136eb4795b51b30a437b7cc27afde4a5719144bb7f77a5fc45ba6b336518e

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