Malicious PDF — malware analysis report

Static analysis result for SHA-256 88b29c817a3e373b…

MALICIOUS

PDF

80.3 KB Created: 2021-03-05 09:51:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-04-03
MD5: 28f5734e393f97239f92331b4bfe1d80 SHA-1: cef802695864876c4fa33f5d104c6ab770d52d5b SHA-256: 88b29c817a3e373b739fafa787c3b1a2117a5b99c40993fa021c272b2c1c61d1
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, many pointing to disposable domains or cloud storage, indicative of a link farm. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. While no scripts were directly extracted, the PDF structure and numerous URLs suggest it's designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9954

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://jumiwimov.ru/wb?keyword=who%20dies%20in%20the%20maze%20runner%203 PDF link annotation
    • http://submonster.xyz/40715852033wcoim.pdfIn PDF document text
    • https://cdn.sqhk.co/sigidezok/yjiCggz/jelafe.pdfIn PDF document text
    • http://tortomsk.ru/4690518616369whr.pdfIn PDF document text
    • https://s3.amazonaws.com/pubopelej/nibixogi.pdfIn PDF document text
    • https://cdn.sqhk.co/tumufiwusifo/8gjicou/rupimumebetoxodesujireri.pdfIn PDF document text
    • https://cdn.sqhk.co/gafisasiwu/jbhau88/jawewixejulatijirikoxoke.pdfIn PDF document text
    • https://s3.amazonaws.com/bepukuba/vewujupukevunabano.pdfIn PDF document text
    • http://skameyki.club/lambda_layers_performancey72ff.pdfIn PDF document text
    • https://menafemudiwifog.weebly.com/uploads/1/3/0/8/130813668/4280102.pdfIn PDF document text
    • https://cdn.sqhk.co/wigalefu/jhRs8JG/dezetabejagepuzuluki.pdfIn PDF document text
    • https://mixutexevegov.weebly.com/uploads/1/3/4/7/134706804/6c496.pdfIn PDF document text
    • https://cdn.sqhk.co/sileluzorupo/jhhfxia/96747223095.pdfIn PDF document text
    • https://simiwulizolur.weebly.com/uploads/1/3/1/4/131455232/7559633.pdfIn PDF document text
    • https://cdn.sqhk.co/pijuvedozuw/pdGCVhb/55029265453.pdfIn PDF document text
    • https://kazamudadi.weebly.com/uploads/1/3/0/7/130775411/b1ed4a96d5e042.pdfIn PDF document text
    • https://s3.amazonaws.com/numegubowalonan/34814151252.pdfIn PDF document text
    • https://cdn.sqhk.co/jivonaxadu/ezibjbs/psp_platformer_games_list.pdfIn PDF document text
    • http://free-at.pro/ssl_pinning_bypass_android_toolstww7g.pdfIn PDF document text
    • https://s3.amazonaws.com/dibedamoka/31783550387.pdfIn PDF document text
    • https://cdn.sqhk.co/kegufamop/gfIijTL/recarga_facil_riocard_duo.pdfIn PDF document text
    • http://worldworkbook.com/repesitlkl00.pdfIn PDF document text
    • https://cdn.sqhk.co/leguzufaju/F0pHpgd/fonts_keyboard_cool_text_style.pdfIn PDF document text
    • https://s3.amazonaws.com/dudigonifu/rirovagavimosizi.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off0000f0ef.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off0000f0ef.bin)
    • http://www.daltonmaag.com/In extracted file (font_02_sfnt_off00012529.bin)
    • http://pixagikaw.epizy.com/bounce_out_game_free.pdfIn PDF document text
    • http://matazovazer.epizy.com/77464824997.pdfIn PDF document text
    • http://bijabigapaj.rf.gd/anderson_benedict_comunidades_imaginadas.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 extracted file (font_00_sfnt_off0000f0ef.bin)

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f0ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0EF 5140 bytes
SHA-256: 58702087d43e88132d78cc951ad8890fabbbf62d5597ebfc8e0fcaf0e284d51d
font_01_sfnt_off00010248.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10248 10240 bytes
SHA-256: ec2a95e109b085cb34e26e4f7d81732b24908c3ef944eb5bb89184b3c16a52b5
font_02_sfnt_off00012529.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12529 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c