Malicious PDF — malware analysis report

Static analysis result for SHA-256 8bd578377371471c…

MALICIOUS

PDF

81.8 KB Created: 2021-03-18 03:11:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: fc588af277dca700f27cc5049ba1fc4d SHA-1: c6389f4cd7333505063bfc6db74b420bb10e45e3 SHA-256: 8bd578377371471cb2ecf96cf7dff3184bb209c53092978101a493b9e8bbd060
226 Risk Score

Malware Insights

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

This PDF document contains numerous external links, many hosted on disposable domains, suggesting a link farm or SEO manipulation tactic. The presence of a password-protected archive lure heuristic indicates an attempt to bypass security controls by encrypting a payload. ClamAV detection and ML classification confirm malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://golowaki.ru/award?keyword=archer+c1200+manual+pdf PDF link annotation
    • https://lozusometuzasop.weebly.com/uploads/1/3/4/7/134741376/7544160.pdfIn PDF document text
    • http://lnstagramverifiedbadgeservice.com/78734687799tslxb.pdfIn PDF document text
    • http://lojasamericanasbr.com/saleebi_jang_in_urdu7ejal.pdfIn PDF document text
    • https://jerisiliv.weebly.com/uploads/1/3/5/3/135314768/buruzubefu-pavaxaludip-kasaxasule-fajisotada.pdfIn PDF document text
    • https://cdn.sqhk.co/migazajigum/DhecjcS/wodezekavegow.pdfIn PDF document text
    • http://salleapp.xyz/falananapelutih18ul.pdfIn PDF document text
    • https://monezoxikaxusoj.weebly.com/uploads/1/3/1/4/131453753/6e2d5774e0a4.pdfIn PDF document text
    • https://guxuxexor.weebly.com/uploads/1/3/0/7/130775085/tajemuwawuxalexofure.pdfIn PDF document text
    • https://tuzutetenufiro.weebly.com/uploads/1/3/4/7/134716615/09236e86ca98ad.pdfIn PDF document text
    • http://avto-document.site/15219212214ds07d.pdfIn PDF document text
    • https://cdn.sqhk.co/jimumakevaji/idGjfic/ludo_king_mod_apk_2020_revdl.pdfIn PDF document text
    • https://cdn.sqhk.co/kisasizaro/rjcGoid/wukupamuwawowilomasovu.pdfIn PDF document text
    • https://cdn.sqhk.co/bikegola/jdchgip/divibifeba.pdfIn PDF document text
    • https://sizigemud.weebly.com/uploads/1/3/4/6/134606095/visate.pdfIn PDF document text
    • https://baboxubawuxi.weebly.com/uploads/1/3/4/6/134666135/bunalovag.pdfIn PDF document text
    • https://wuzinetasinozud.weebly.com/uploads/1/3/1/6/131606123/2493581.pdfIn PDF document text
    • http://nexofozupugasi.mywebcommunity.org/nutukugixu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.fontrix.comhttp://www.nhncorp.comIn PDF document text
    • http://lojibovel.myartsonline.com/antilogarithm_download.pdfIn PDF document text
    • https://s3.amazonaws.com/xetasif/tifavetowon.pdfIn PDF document text
    • https://s3.amazonaws.com/wemazun/api_platform_filter_entity.pdfIn PDF document text
    • https://s3.amazonaws.com/kovezux/vusukubajud.pdfIn PDF document text
    • http://rabelinowizufe.myartsonline.com/11679613193.pdfIn PDF document text
    • https://fccid.io/TE7C1200/User-Manual/Archer-C1200-User-Manual-2016-08-08-3114096.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_off0000f3c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3C9 5532 bytes
SHA-256: 114640e0ba0a2ee708c918bbd98f351bda2d7c10e405500dbfe02d000bc0e420
font_01_sfnt_off00010676.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10676 13044 bytes
SHA-256: 1df691dbd57dda5d1f697b38af79eb2c9666eca0a6bc20cfa5aeabeb338db163
font_02_sfnt_off0001300d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1300D 2240 bytes
SHA-256: 60d3b7debc1425c4f6eb43546aa86c819d8354c3f89b791bf4b1481fec5c9c7a