Malicious PDF — malware analysis report

Static analysis result for SHA-256 bbb47b6b6c7470d6…

MALICIOUS

PDF

84.9 KB Created: 2021-02-18 11:39:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 7852d4206f5c8c222b47cf3c1d9cd15f SHA-1: 84e28b348163befb53ffb00524396fb74d81485f SHA-256: bbb47b6b6c7470d6193f9bef3771ca479a07d43e219a2965e8ccd2ddaa7c6d5e
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many hosted on disposable domains, indicating a link farm designed to direct users to potentially malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and numerous external links are indicative of techniques used to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://bologen.ru/wb?keyword=what%20is%20enlightenment%20immanuel%20kant%20pdf PDF link annotation
    • https://sitepofom.weebly.com/uploads/1/3/1/4/131438718/dcca2b64af.pdfIn PDF document text
    • https://dugizixenopiloj.weebly.com/uploads/1/3/4/4/134457585/lijabogezozove-vilemaviponodu-ketoxur-xitikogulame.pdfIn PDF document text
    • https://cdn.sqhk.co/linidivez/fQedVhc/create_your_own_vpn_tunnel.pdfIn PDF document text
    • https://togawikanow.weebly.com/uploads/1/3/5/3/135320583/47a072975cb0.pdfIn PDF document text
    • https://cdn.sqhk.co/kekotenonaxu/hiigiaf/jagamagije.pdfIn PDF document text
    • https://wilulesutazi.weebly.com/uploads/1/3/3/9/133997377/15666.pdfIn PDF document text
    • https://cdn.sqhk.co/wifukatar/bihMgiU/space_racing_2_apk_mod.pdfIn PDF document text
    • https://jefamozalubibul.weebly.com/uploads/1/3/1/4/131438275/5477738.pdfIn PDF document text
    • http://gadokuzepot.22web.org/firitodigomapoxuzu.pdfIn PDF document text
    • https://pikopivani.weebly.com/uploads/1/3/4/5/134510180/jokewikixokiz.pdfIn PDF document text
    • https://dijamolilum.weebly.com/uploads/1/3/5/3/135347404/5873015.pdfIn PDF document text
    • https://cdn.sqhk.co/niramojiga/iji72ic/samsung_galaxy_4x.pdfIn PDF document text
    • https://zafasasuk.weebly.com/uploads/1/3/4/7/134713251/dosupekadexaw.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kebowikosu.epizy.com/120487373.pdfIn PDF document text
    • https://s3.amazonaws.com/rekorewexidiwo/nufapitivugema.pdfIn PDF document text
    • https://s3.amazonaws.com/bisapovepizaj/application_documentation_format.pdfIn PDF document text
    • http://nazopagoja.epizy.com/jazz_police_guitar_sheet_music.pdfIn PDF document text
    • http://mujawonevafo.rf.gd/78327885736.pdfIn PDF document text
    • https://s3.amazonaws.com/fomudebipefasu/bojezoji.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_off00010ab5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AB5 5436 bytes
SHA-256: 36b279b85eaa6bdef65ecb09caeb0073f36d387a0d8595c9fae220fd1531dd89
font_01_sfnt_off00011d21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D21 12012 bytes
SHA-256: b45a456f8546ebd99e2e898fcb6cde1365eb3da783b440cba90d676c5ab33f79

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