Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ce456c824fba16c…

MALICIOUS

PDF

94.3 KB Created: 2021-04-30 15:45:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 25848a3a25e406506cd950054eb7c474 SHA-1: 302eb5509000b3959fb804065d3959a277ebd36f SHA-256: 1ce456c824fba16cf2c856d575764a1359b043942cee61d5f5a7558d22bcda95
186 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by a ClamAV signature and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many pointing to disposable hosting, suggesting a link farm or phishing operation. The primary external URL, 'https://lozipotod.ru/strik?utm_term=washington+dc+covid+restrictions+november', appears to be a lure for users searching for COVID-19 restrictions, likely leading to further malicious content or phishing pages.

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 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://lozipotod.ru/strik?utm_term=washington+dc+covid+restrictions+november PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4471958/normal_602af46466de9.pdfIn PDF document text
    • https://nafuxiba.weebly.com/uploads/1/3/4/0/134097784/471646.pdfIn PDF document text
    • https://cdn.sqhk.co/xexerekija/dgd5qYF/nikutobipejumokizir.pdfIn PDF document text
    • https://cdn.sqhk.co/luvutagawata/3mWczas/jelepebimewelaki.pdfIn PDF document text
    • https://kaxogirigajel.weebly.com/uploads/1/3/4/6/134611066/putokubid-gojafebadiwew.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388620/normal_604fc6f94f5f4.pdfIn PDF document text
    • https://xonimitofowe.weebly.com/uploads/1/3/2/6/132682232/7fce0375321ce.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379844/normal_60454aa1388dd.pdfIn PDF document text
    • https://cdn.sqhk.co/dagozuwemep/iaMeheI/undertale_battle_simulator_2_player.pdfIn PDF document text
    • https://cdn.sqhk.co/moxibusas/O3bREhi/dokdo_shrimp_liver.pdfIn PDF document text
    • https://zekenegelu.weebly.com/uploads/1/3/4/3/134390475/jukadorurefasi.pdfIn PDF document text
    • https://cdn.sqhk.co/zapimafe/ijjeje7/16312200655.pdfIn PDF document text
    • https://nesibebinirudeb.weebly.com/uploads/1/3/5/3/135311353/surawowofewa_fujofokil_nedanubuto.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487918/normal_604e2382b6139.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448744/normal_605d12e80faf0.pdfIn PDF document text
    • https://cdn.sqhk.co/gimexigerub/ihJighc/93292884969.pdfIn PDF document text
    • https://xuwovovap.weebly.com/uploads/1/3/1/6/131607152/vofemezumuxopon.pdfIn PDF document text
    • http://fontawesome.iohttp://fontawesome.io/license/In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/dinigugaxej/dalaka.pdfIn PDF document text
    • https://s3.amazonaws.com/legesiliv/53257794904.pdfIn PDF document text
    • https://s3.amazonaws.com/pafexegud/how_to_reset_time_on_verifone_vx520.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_off0001273d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1273D 1752 bytes
SHA-256: d8a180b7a1cbbb043a1a0c5d2057d58349472b8884a3a6ea844f575f0b6b4c3a
font_01_sfnt_off00012fd9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12FD9 5536 bytes
SHA-256: 959ae769a4317fb15a9fa2efd5a3a9d3e37069984674f2e4383ecabe022a3842
font_02_sfnt_off00014292.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14292 11364 bytes
SHA-256: e2a2dd2b2169597fc369dd6c414805085a4cf693d1a008ff2e657bc595190c22