Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a47e7c1aa98870d…

MALICIOUS

PDF

75.4 KB Created: 2021-04-20 13:13:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: d58bc4d4d44c5dbccadf29fde5370989 SHA-1: 1b4b417d791914fba7fb75a6a9b139a68e6a4524 SHA-256: 9a47e7c1aa98870df15c8c4746c5d8358bf7faf25256266ca7066f04476d44b9
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 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://kuzutuzo.ru/strik?utm_term=dell+monitor+2405fpw+manual PDF link annotation
    • http://pifofobexaxel.mypressonline.com/46680474287.pdfIn PDF document text
    • http://kavakedego.scienceontheweb.net/inorganic_chemistry_notes_iit_jee.pdfIn PDF document text
    • http://wobafobigo.mywebcommunity.org/38870471580.pdfIn PDF document text
    • https://cdn.sqhk.co/xenivoronizu/jbtQijZ/36717566158.pdfIn PDF document text
    • http://prizinsta365.website/charity_pick_up_used_furnitureor9er.pdfIn PDF document text
    • https://newowuwaw.weebly.com/uploads/1/3/4/6/134634034/badukanepog_supaxepoxedal_megemaw.pdfIn PDF document text
    • https://cdn.sqhk.co/mugejufunij/9jer4gj/best_space_trading_game_android.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4389387/normal_5fcf2813483dd.pdfIn PDF document text
    • https://fubaxegadajud.weebly.com/uploads/1/3/4/4/134454669/9f97ab56e075.pdfIn PDF document text
    • http://wwwbcpzonasegura-viabcp.com/21239974002s2qs6.pdfIn PDF document text
    • http://de-bewertung-889562.icu/karamodagekagasibuloritozbztek.pdfIn PDF document text
    • https://cdn.sqhk.co/nuponoviva/xFifQtg/rotten_teeth_falling_out_dream.pdfIn PDF document text
    • https://cdn.sqhk.co/bazexolareja/geyBghA/difference_between_apoptosis_and_necrosis.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409614/normal_60122c20b48d9.pdfIn PDF document text
    • https://rerararomimin.weebly.com/uploads/1/3/1/3/131383042/bipuxelevufisij_nazaronoworal.pdfIn PDF document text
    • https://winojarenegesut.weebly.com/uploads/1/3/4/4/134481716/gekexej.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://naxesabefadufu.atwebpages.com/zunekafoxija.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1d242e45-2590-4cda-b007-1782f075f665/86888128749.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9226816c-3487-4cd2-904c-7d028dd8c67e/what_is_private_international_law_and_public_international_law.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bccb9cf7-a9cb-4fd3-8429-c4dbc3a8cafe/98686435244.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ce61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE61 5328 bytes
SHA-256: 1b326c6b2c832a8868b36cd04bc64ce7e825fc2593ce79b38b508068712a0e6a
font_01_sfnt_off0000e07f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE07F 15568 bytes
SHA-256: a454a019a3fc67c7517a90ec24fecaf79af7663cc9017e1db100b9a101027cd3
font_02_sfnt_off00011052.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11052 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

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