Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f484b707e1bd01e…

MALICIOUS

PDF

69.4 KB Created: 2021-06-06 17:29:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 833bbbb0562eacf694f0ffbe4c8ee5ea SHA-1: 3026c8c41cceae5b41f1f343a4c78f2ca7e5663f SHA-256: 2f484b707e1bd01e18f53444927ded474e124596506fba62a6a92bf9a8b32d87
124 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

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 0.9673

Heuristics 4

  • 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
  • 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://smidgel.ru/pbw?utm_term=how+to+use+ghost+white+toner PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4415322/normal_602dab12364f6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417662/normal_602a578033eb4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366344/normal_5feb256c12ed2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405650/normal_6050f10e3f2cc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392199/normal_6015f5d193974.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kufogokoges.pbworks.com/w/file/fetch/144463047/comprehension_passages_for_class_12.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c5dd9af7-8b90-401a-b00c-7136a5cf9ece/the_game_movie_trailer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/06c003e7-080f-47ae-9e72-fe18fd8127cd/14675967165.pdfIn PDF document text
    • http://puzavofan.pbworks.com/w/file/fetch/144544242/digusufagasavivabuges.pdfIn PDF document text
    • http://zupelapowi.pbworks.com/f/faragepixepetegexokew.pdfIn PDF document text
    • http://kinuwibe.pbworks.com/f/letep.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/71d99afb-765c-497f-82ac-ce9721a34680/84502014183.pdfIn PDF document text
    • http://poforezufovu.pbworks.com/f/75532796180.pdfIn PDF document text
    • http://wikitaxif.pbworks.com/w/file/fetch/144677988/.pdfIn PDF document text
    • http://pagorevet.pbworks.com/f/mikakosunopepelekesu.pdfIn PDF document text
    • http://nimulivupale.pbworks.com/w/file/fetch/144623679/.pdfIn PDF document text
    • http://zepadatoju.pbworks.com/w/file/fetch/144415191/fuxabekosoli.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/75c1181a-4cff-4edd-9350-b1ed1c3da9b5/search_google_play_store_application.pdfIn PDF document text
    • http://zixememot.pbworks.com/w/file/fetch/144733998/57327903246.pdfIn PDF document text
    • http://fajopab.pbworks.com/w/file/fetch/144550371/seat_leon_fr_tdi_service_intervals.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cfd901b0-7cf2-4da6-ac55-bf2054f0287f/diablo_2_lod_multires_1.13_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/33e22448-c5db-4133-a994-dc6a08558fbb/twilight_saga_eclipse_movie_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4d7ad4f2-d7c2-4237-91c0-c03db59bcc83/how_to_do_a_capability_statement.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_off0000f31b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF31B 4756 bytes
SHA-256: 420dee876240ebaca37f7965034110dc7f4ea14632a21b20584bcf349f411355

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