Malicious PDF — malware analysis report

Static analysis result for SHA-256 4249424585c30daf…

MALICIOUS

PDF

65.3 KB Created: 2021-02-21 08:53:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 80a6d471d915ab18e8b175f094fab74e SHA-1: 7c3146a65e55ac842ae77bbda6da2c3631c950ca SHA-256: 4249424585c30dafdec5d2f3c7ca1e6419e53354aeb37777e30add610b16133d
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, suggesting a link farm or phishing attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and numerous external URLs point towards a phishing or redirection scheme, likely initiated via a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://druttle.ru/123?utm_term=best+price+on+dyson+cinetic+big+ball+animal PDF link annotation
    • https://degusatujetuz.weebly.com/uploads/1/3/0/8/130813325/1884198.pdfIn PDF document text
    • https://boxatikavizag.weebly.com/uploads/1/3/4/6/134680825/vasowupexujima-zazorifofuku-kigibagovev.pdfIn PDF document text
    • http://joteruzawareba.iblogger.org/sewakawimo.pdfIn PDF document text
    • https://nawuwisenaz.weebly.com/uploads/1/3/5/3/135318134/tuwivupasisa.pdfIn PDF document text
    • http://papotupeti.iblogger.org/sivarazepigajemo.pdfIn PDF document text
    • https://jatitebomotopoz.weebly.com/uploads/1/3/0/7/130776336/915ea5e45b7.pdfIn PDF document text
    • https://cdn.sqhk.co/molivovuki/ii2CSii/lion_go_launcher_theme_apk_free_download.pdfIn PDF document text
    • https://fenibelamej.weebly.com/uploads/1/3/4/4/134464240/5763825.pdfIn PDF document text
    • https://cdn.sqhk.co/tipusuzog/yNgjiaa/toolbox_murders_blu_ray_review.pdfIn PDF document text
    • https://vuwapelenepaje.weebly.com/uploads/1/3/4/7/134705438/0d22fa6efbfa.pdfIn PDF document text
    • http://mozodulo.iblogger.org/besharam_film_all_song.pdfIn PDF document text
    • https://cdn.sqhk.co/korokotuduki/l9jhhcm/police_scanner_xm_radio.pdfIn PDF document text
    • https://tasimaxexakopox.weebly.com/uploads/1/3/2/6/132681882/6a5607eac.pdfIn PDF document text
    • https://mizefubu.weebly.com/uploads/1/3/4/6/134637235/2fe54a6a0.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://banigigafizaje.epizy.com/niwinixuxatalazinibuxoxid.pdfIn PDF document text
    • https://s3.amazonaws.com/setaxilitozuko/81873318980.pdfIn PDF document text
    • http://mojogisi.epizy.com/vitamix_7500_blender_how_to_use.pdfIn PDF document text
    • http://xuxuxal.epizy.com/typical_medical_school_interview_questions_and_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/sitozi/79708022224.pdfIn PDF document text
    • https://s3.amazonaws.com/zepifudoxapo/zevubilidinasadategavat.pdfIn PDF document text
    • http://xeravujowa.epizy.com/xosixomufibunin.pdfIn PDF document text
    • https://s3.amazonaws.com/jozetej/91565244716.pdfIn PDF document text
    • http://wanezezigemos.rf.gd/pokemon_sun_and_moon_gba_game.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_off0000bf83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBF83 5684 bytes
SHA-256: 34dec47d7479e37e671225cf3610cab22d5f208c4b71adc22379d1b7ca6b609e
font_01_sfnt_off0000d2cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2CC 10772 bytes
SHA-256: 49e0eaf7804fa14afe4cae1d7ed5dcfdbbff04967e71b19e46ed20fb4325307c

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