Malicious PDF — malware analysis report

Static analysis result for SHA-256 dcfa876d8e19ec02…

MALICIOUS

PDF

58.6 KB Created: 2021-02-02 22:31:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: fe63a99692e3173bcee63be21fbb4b91 SHA-1: 7a58a3cea3895e38962f02edfc222917d22aa195 SHA-256: dcfa876d8e19ec020236d4dbddd63a9e1aeff94a6496722283fd56f53e9bf0f2
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9070

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 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
  • 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://jottigo.ru/aws?utm_term=approximation+maths+pdf PDF link annotation
    • https://dexuganepo.weebly.com/uploads/1/3/1/6/131608037/c27c870d2.pdfIn PDF document text
    • https://zogugixuwomu.weebly.com/uploads/1/3/4/2/134234599/f8836.pdfIn PDF document text
    • http://magnifioco.site/atlantis_alien_visitation_and_genetic_manipulation7xebp.pdfIn PDF document text
    • http://silkhfig.bid/epson_moviemate_72_tri-_lcd_projectorihja9.pdfIn PDF document text
    • http://evatopshop.xyz/susimalelj6hwg.pdfIn PDF document text
    • https://nezozavigarej.weebly.com/uploads/1/3/4/7/134727028/6869239.pdfIn PDF document text
    • https://sitofozaliwi.weebly.com/uploads/1/3/4/3/134355749/1485353.pdfIn PDF document text
    • https://zuxadozi.weebly.com/uploads/1/3/4/6/134662888/5269fe8780bd.pdfIn PDF document text
    • https://diwetipitas.weebly.com/uploads/1/3/5/3/135327042/nomofidozejub_pedubulusato_dizedeb.pdfIn PDF document text
    • https://litokotivugobud.weebly.com/uploads/1/3/2/6/132695550/xuwewakusadom.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://roxadib.epizy.com/56480134601.pdfIn PDF document text
    • http://lunufisisosixi.rf.gd/petotutesaro.pdfIn PDF document text
    • http://zekakodususebu.epizy.com/recyclerview_android_example_with_image.pdfIn PDF document text
    • http://sarirepenibe.epizy.com/15551839302.pdfIn PDF document text
    • http://nototen.epizy.com/bigo_hack_apk.pdfIn PDF document text
    • http://zenowalu.rf.gd/bike_blast_game_apk.pdfIn PDF document text
    • http://vofofoduwegakuv.rf.gd/69428583605.pdfIn PDF document text
    • http://vutaxinasiva.epizy.com/accomplishment_report_example.pdfIn PDF document text
    • http://vukenorap.epizy.com/buyers_credit_as_per_rbi_guidelines.pdfIn PDF document text
    • http://faxaxesaxejov.rf.gd/29899247376.pdfIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d771.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD771 4976 bytes
SHA-256: b34d9fbe1ac4ab236b94f3f253b9169f92cc2529dcdbeb73a79aad120b61c148

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