Malicious PDF — malware analysis report

Static analysis result for SHA-256 57771c431ce6c428…

MALICIOUS

PDF

79.4 KB Created: 2021-03-21 11:22:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 31b2f0946f68c5c4afcc0c7fe591fcd7 SHA-1: 2b75f38b5a97c927dfc20c27500a0089a41d1303 SHA-256: 57771c431ce6c4280d7268e72be4bf75dee05267ce6f8482994dbb2be1280855
126 Risk Score

Malware Insights

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

The PDF file contains numerous links to external websites, many of which are hosted on disposable domains and utilize UTM parameters, indicating a phishing or scam attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or distributing further malware. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with a phishing lure designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 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/strik?utm_term=how+to+bid+at+an+auction PDF link annotation
    • http://guwobedegaf.22web.org/jofexe.pdfIn PDF document text
    • http://airet.space/lorebanolereme8tww3.pdfIn PDF document text
    • http://bavunexebiri.iblogger.org/witikululosufidokad.pdfIn PDF document text
    • http://tepexew.iblogger.org/lojusuderanowusago.pdfIn PDF document text
    • http://golosa-spasibo.ru/29953377643p0x9d.pdfIn PDF document text
    • http://remastacer.com/wamovatewefatesalujiraoda2z.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490366/normal_6018a121d3e49.pdfIn PDF document text
    • http://allostar.buzz/how_to_change_oil_snapper_riding_mowerpqdso.pdfIn PDF document text
    • http://lawyer-consult.ru/calendario_septiembre_2020_chile_con_feriados0zemm.pdfIn PDF document text
    • http://snatural.space/sazafoxn5au.pdfIn PDF document text
    • http://idealica-uficiale.website/88872888787xuexw.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421780/normal_60087ba2e567c.pdfIn PDF document text
    • http://selectgetc.top/54870541664ox7yr.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wekolaxoretewov.epizy.com/88568380112.pdfIn PDF document text
    • http://zifunugol.epizy.com/94635897042.pdfIn PDF document text
    • https://s3.amazonaws.com/kofabube/50336011893.pdfIn PDF document text
    • http://nimezidudixo.epizy.com/lumupodopiduw.pdfIn PDF document text
    • https://s3.amazonaws.com/wufujudisu/boy_scout_manual_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/bejexe/angamaly_diaries_full_songs_free.pdfIn PDF document text
    • https://s3.amazonaws.com/biwuwukesazef/box_culvert_design_spreadsheet.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_off0000fa34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA34 4820 bytes
SHA-256: 4f2e734c40bfa86d3d7854b76f255d6a48b39f8ba4861dda781c657abd664cf0
font_01_sfnt_off00010ab8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AB8 11176 bytes
SHA-256: a60ef13ababe5c8a2d67f5b725e41046fa57c5dcacc52bb43c41217e57ce28ca

Open this report in the interactive analyzer, or submit your own file for analysis.