Malicious PDF — malware analysis report

Static analysis result for SHA-256 f1ab0e7d1880bfbe…

MALICIOUS

PDF

90.5 KB Created: 2021-02-15 09:43:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: 04db8a60233ee43d00e2ff9c7dfd5590 SHA-1: 814f8f70d2be967bd9303100fb157f0d39fbd46b SHA-256: f1ab0e7d1880bfbef611ca5f7ea57cc018dcd761151827f93e49c9385cd54ce0
186 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as a credential phishing lure impersonating Microsoft Outlook. It contains numerous external links, many pointing to disposable domains and redirectors, designed to lead the user to a phishing page. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for credential harvesting.

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
  • Brand-impersonation credential phishing lure critical SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: action link to abused redirector https://nibafokabatawal.weebly.com/uploads/1/3/0/9/130970001/loxekef-lokufig-nuxokimofu-sijaderu.pdf.
  • 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://seumenha.ru/strik?utm_term=primary+election+2020+illinois+candidates PDF link annotation
    • http://zadokutasige.22web.org/weguler.pdfIn PDF document text
    • http://demigatakubap.iblogger.org/reliable_manual_cars_under_5k.pdfIn PDF document text
    • https://nibafokabatawal.weebly.com/uploads/1/3/0/9/130970001/loxekef-lokufig-nuxokimofu-sijaderu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4411246/normal_5fc851691460c.pdfIn PDF document text
    • http://gprofights.ru/going_postal_tv_guidey02lw.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404753/normal_5feb48a2eff6d.pdfIn PDF document text
    • http://detonicinitalia.website/22427998898bc8tm.pdfIn PDF document text
    • https://tawedituja.weebly.com/uploads/1/3/4/8/134864040/feranuk.pdfIn PDF document text
    • http://digitalmedialit.com/nixukovuzilutepijarujal4i4r.pdfIn PDF document text
    • http://kupivse.xyz/xanifokibenitezikisijby642.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367947/normal_6027f374deaa8.pdfIn PDF document text
    • http://iglivesupportteam.com/konunuluxobuxumesafiuzs02.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/senodiw/before_sunset_full_movie_480p.pdfIn PDF document text
    • https://s3.amazonaws.com/bulozor/calvin_klein_shoes_size_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/dazuxujepov/divexakupezufubi.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_off00012279.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12279 5464 bytes
SHA-256: 8f691739eed506b244c1d1c7fa9a382c457693dd829645aca8aea68189fe2d57
font_01_sfnt_off000134f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x134F7 11976 bytes
SHA-256: d21bf86f2c2ef42480e2080cdc86edf70b3e2317344a107043554fd555f1db63

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