Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ede869b3ff74f56…

MALICIOUS

PDF

75.6 KB Created: 2021-03-01 01:42:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 98e32a2747c9b870d12f9b942b90b524 SHA-1: b36a47d3504d159e7e4b51c7d6b2d9bde29ea498 SHA-256: 1ede869b3ff74f564b4cf836515fa79eb7adf65dcb8a321f3d87cdf85a8ac3cf
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links pointing to various PDF documents hosted on disposable domains, as indicated by the PDF_SEO_LINK_FARM and PDF_SEO_DISPOSABLE_LINK_FARM heuristics. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or distributing malware. No scripts were extracted, but the embedded URLs themselves are the primary indicators of malicious activity.

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://soxebez.ru/strik?utm_term=what+does+red+mean+personality PDF link annotation
    • https://pagomowe.weebly.com/uploads/1/3/4/6/134608852/6dedf.pdfIn PDF document text
    • https://xudisuwovoj.weebly.com/uploads/1/3/5/4/135400752/3743092.pdfIn PDF document text
    • https://jiwuzutobaduf.weebly.com/uploads/1/3/4/8/134889186/6357432.pdfIn PDF document text
    • https://tanuroxej.weebly.com/uploads/1/3/4/1/134131309/zafesigupu.pdfIn PDF document text
    • https://cdn.sqhk.co/jefigujaxev/ihgciha/kimesise.pdfIn PDF document text
    • https://luwujapi.weebly.com/uploads/1/3/4/7/134751522/botokisa_tumoxopixigave_kajaliguni.pdfIn PDF document text
    • https://cdn.sqhk.co/bojowagawire/iajb6Mz/super_mario_world_map_editor.pdfIn PDF document text
    • https://dubobovutorikug.weebly.com/uploads/1/3/5/3/135332124/9926338.pdfIn PDF document text
    • https://liloxowilobo.weebly.com/uploads/1/3/4/2/134265539/096b7054d9e5.pdfIn PDF document text
    • http://kasyanbeauty.com/nanexozegabogiwakemk7qw6.pdfIn PDF document text
    • https://cdn.sqhk.co/begokaxawip/1gfiiRG/street_fighting_3_king_fighters_mod.pdfIn PDF document text
    • http://manthoughtswebsite.website/simivoxilezedet5b9hs.pdfIn PDF document text
    • https://magudutetu.weebly.com/uploads/1/3/1/4/131437318/sizubuzoj.pdfIn PDF document text
    • https://cdn.sqhk.co/kifuzopeko/hqgfjjE/pibumeninaxof.pdfIn PDF document text
    • https://cdn.sqhk.co/nudotunaza/hhTifhf/47128314173.pdfIn PDF document text
    • https://cdn.sqhk.co/kevekelobivo/ehhxjcy/bad_piggies_hd_hack_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/tedubifo/dYjjkeY/xigozezezegif.pdfIn PDF document text
    • https://tezefidusipenu.weebly.com/uploads/1/3/1/8/131857758/fawukugasusibo.pdfIn PDF document text
    • https://cdn.sqhk.co/goremujoz/pjjidje/58823225823.pdfIn PDF document text
    • http://ingmijn.com/jutasazo516c2.pdfIn PDF document text
    • http://lnstagram-helps-contact.com/70129558332ft5zr.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000eaa0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAA0 5312 bytes
SHA-256: f8a20889c50b85480c868a7222c5723009b8de82aa44c18a782c106988081364
font_01_sfnt_off0000fc94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC94 10696 bytes
SHA-256: e2a1afb077c80303a58856a453dad68b236b64c43e32c3402eb97815636a4d2f