Malicious PDF — malware analysis report

Static analysis result for SHA-256 e02b5524c787d97c…

MALICIOUS

PDF

80.0 KB Created: 2021-03-16 12:43:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 18788b783aee69056b74e039cd1a62be SHA-1: 2fadbefa6b3c0848de632198f1e4d30ae25e59be SHA-256: e02b5524c787d97c3fe32c320c68e91986a6131f32195558d110a23559c6246f
146 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses a callback-phone (TOAD) lure. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://lozipotod.ru/strik?utm_term=central+machinery+drill+press+chuck PDF link annotation
    • http://meetsoda.club/94025005769lewax.pdfIn PDF document text
    • https://definifizuzum.weebly.com/uploads/1/3/4/7/134759181/xogolarefeti_raxuwip.pdfIn PDF document text
    • http://uplrezina.site/21383904375jvio1.pdfIn PDF document text
    • http://vubitim.sportsontheweb.net/past_simple_regular_verbs_negative_exercises.pdfIn PDF document text
    • http://vugekowuzujed.scienceontheweb.net/16001801516.pdfIn PDF document text
    • http://copyright-securityx.com/bixudelejalimiralefifotnqwz.pdfIn PDF document text
    • http://sberbank.services/99636352976clrpp.pdfIn PDF document text
    • http://vinorama.fun/can_gold_be_burned_upspo7n.pdfIn PDF document text
    • http://myimperfectmomlife.com/suzegobaxakupifibufizaguvf671y.pdfIn PDF document text
    • https://selilanabos.weebly.com/uploads/1/3/4/8/134875664/nozamujob.pdfIn PDF document text
    • http://mazers.fun/hoja_de_rifa_100_numeros_para_imprimek63c.pdfIn PDF document text
    • http://muzoc.xyz/vanguardia_organizada_del_pueblo2tfli.pdfIn PDF document text
    • http://55571.ru/fiselip5pnu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://remigesej.epizy.com/free_printable_letter_x_coloring_sheets.pdfIn PDF document text
    • http://pixudavevenute.rf.gd/digitech_pedal_board_rp255.pdfIn PDF document text
    • http://mujujum.epizy.com/warodinobufatuzixi.pdfIn PDF document text
    • http://rikovinob.epizy.com/how_does_directv_work_in_apartment_buildings.pdfIn PDF document text
    • http://zexeborora.rf.gd/audible_book_not_ing_on_iphone.pdfIn PDF document text
    • http://wisimuru.rf.gd/1978_honda_xr75_value.pdfIn PDF document text
    • http://muxajetolalet.epizy.com/limorugigatovasegetux.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_off0000fad5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAD5 5384 bytes
SHA-256: 2d846e540646c7f304a62633878845b1bd5513b28e2aad2353e78f1aa3944299
font_01_sfnt_off00010cfc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CFC 10944 bytes
SHA-256: f227eb7ef4be0e5f48cb789fcf9750877caac0fd3399919c899d518f2f73c34e