Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e17831c44fbe163…

MALICIOUS

PDF

77.4 KB Created: 2021-05-02 09:46:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 22fc10784d8c44fda5a742a3f972d585 SHA-1: b1cb7ea38fe49aa33740d73826b48303338b6c41 SHA-256: 9e17831c44fbe1638a34491f6d33fff05bb3705d0ef356fb782dc342c95073e7
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9998

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://dugedepap.ru/strik?utm_term=singer+4423+heavy+duty+sewing+machine+white PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4410953/normal_60413771aaf44.pdfIn PDF document text
    • http://kpupnov.pro/vubewezepuposimafalaoqsyo.pdfIn PDF document text
    • http://eliyalte.com/rozereferuvakego9ng9u.pdfIn PDF document text
    • http://openplafond.xyz/kagapa307ki.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4482413/normal_5ffd45c794111.pdfIn PDF document text
    • http://tryadasert.online/498795304496h25p.pdfIn PDF document text
    • http://cosmicgig.com/52723953794hzmu4.pdfIn PDF document text
    • http://help-violation.com/68132541127xvg7p.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4479905/normal_5fed69fe78394.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/594249e7-7ae9-4fdd-899a-24baf7a6e783/vampire_diaries_season_1_episode_17_watch_online.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7d90561c-a754-4a48-88a5-7fbfe51a6cad/graco_nautilus_3_in_1_car_seat_remove_back.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fa4bf8ad-93ed-4b59-8f6a-a8ded766a943/pexijokanilajolivemu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/47b44e90-3bf6-49bf-915e-ac8c81eee20c/37414347885.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7661f414-f929-41e8-9a1f-2186eed1b580/cub_scout_wolf_book_online.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3bb6f846-4cbe-4d21-aba3-b9f9dc744ad8/93675682016.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2f0bbd17-908b-47fd-a18f-321f4dc59c41/lenovo_y50_memory_upgrade.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9373c19c-62ba-4ec9-a5b7-51f77d9928e5/stihl_hedge_trimmers_reviews.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ec76a7df-7920-4fc1-8a77-5cf05062fa6b/77375878191.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e8bd67ca-16ab-4223-82d9-9976fe1294c0/ps4_gold_wireless_headset_connect_to_phone.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_off0000eef9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEF9 6064 bytes
SHA-256: 3a8f8308c32d8e6ddb46c8ad259fd780d0297dcb46d4d4de5f153c902de49aeb
font_01_sfnt_off00010395.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10395 10268 bytes
SHA-256: d6a359a80f143067f80d5706d364be1cdcff740720a79605537e1657c7ca5cad

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