Malicious PDF — malware analysis report

Static analysis result for SHA-256 82d8ab71b7288c06…

MALICIOUS

PDF

74.3 KB Created: 2021-03-27 12:46:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 03e5f8e76ca270ab6052890425d3b004 SHA-1: 984c0382a3add881e04e66d5dd65b679fe084318 SHA-256: 82d8ab71b7288c067766255326aabf5584bc608db5960601eb4e80a7daba70f5
126 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ClamAV and an ML classifier. It contains an embedded URI pointing to a suspicious domain, disguised with keywords related to technical interviews. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates the PDF is part of a link farm on disposable hosting, further suggesting a malicious intent to redirect users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://botokaw.ru/award?keyword=technical+interview+questions+and+answers+for+desktop+support+engineer+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4448345/normal_60503158466c7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4394079/normal_5fd9e5376741e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386080/normal_60272bafca02d.pdfIn PDF document text
    • https://cdn.sqhk.co/teposodigar/cQNwpgj/50049567711.pdfIn PDF document text
    • http://sun-italy.space/australian_catholic_super_withdrawal_formhz0n1.pdfIn PDF document text
    • https://cdn.sqhk.co/juvebuzizej/gfgdcih/neferujinetixewoterupekow.pdfIn PDF document text
    • http://pasiworuwiwoz.getenjoyment.net/rafititoxilajet.pdfIn PDF document text
    • http://ruwufuwetoj.mygamesonline.org/june_2020_calendar_printable.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378152/normal_60536c3d9f8e3.pdfIn PDF document text
    • http://suzofovolavuk.scienceontheweb.net/amharic_fiction_books_free.pdfIn PDF document text
    • http://dress-russia.ru/67778468581h5mbo.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/jeponowon/zusosofidejikefosezegom.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/136daad7-2c41-42e4-8a60-a99616909e75/87017132598.pdfIn PDF document text
    • https://s3.amazonaws.com/tosego/bhaiya_gana_video_ing.pdfIn PDF document text
    • http://lenofafezanobu.atwebpages.com/love_rosie_cecelia_ahern_espaol.pdfIn PDF document text
    • https://s3.amazonaws.com/rewepalazamiso/disaj.pdfIn PDF document text
    • https://s3.amazonaws.com/xurixado/are_smith_and_wesson_guns_made_in_america.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5c3ad48e-82d5-4b94-9118-2b3858a73e08/how_to_prepare_for_gre_test.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_off0000e17c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE17C 5708 bytes
SHA-256: 1f91a70c76f2f11f921bcdae7b9717f2f646615295a60b35e529a644a7a925fb
font_01_sfnt_off0000f4f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4F1 11276 bytes
SHA-256: 59fd39962c280a6246e84e30d8c5bd79dc2b3823d4c81ec7aee5f7a290820c1d

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