Malicious PDF — malware analysis report

Static analysis result for SHA-256 90360f7c80953a16…

MALICIOUS

PDF

87.8 KB Created: 2021-03-15 14:45:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 2366651ee7190c0b9285724623cfd9e1 SHA-1: ed506bb9d800dd98bb97b285d067871c0b896b65 SHA-256: 90360f7c80953a164d1f2706c49fb9a2aa0fe86c582e2aece0cb31835a993947
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, containing numerous embedded URLs that point to other PDF files hosted on various domains, some of which appear disposable. The primary purpose seems to be directing users to potentially malicious content, possibly for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

Heuristics 6

  • 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
  • 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://nipisod.ru/strik?utm_term=what+is+bagheera+mean+in+english PDF link annotation
    • https://cdn.sqhk.co/kilalovuge/tB2jije/applecare_lost_device.pdfIn PDF document text
    • http://blankid.ru/72045861279rfnps.pdfIn PDF document text
    • http://zigapajuxijado.mywebcommunity.org/72248707153.pdfIn PDF document text
    • https://cdn.sqhk.co/mogizilo/fIjTjjD/hd_pic_sad_boy_alone_weeping.pdfIn PDF document text
    • http://hookup154.online/xolafuxatunibasuvaginob63kdp.pdfIn PDF document text
    • https://cdn.sqhk.co/wepurodapike/YEgjhcD/best_90s_music.pdfIn PDF document text
    • https://cdn.sqhk.co/ridasozewe/iegeKia/degomebizizar.pdfIn PDF document text
    • http://xedeporib.medianewsonline.com/brother_hl-2270dw_printer_toner_reset.pdfIn PDF document text
    • http://iwhite.space/colores_de_los_chakras_y_significadofo1ps.pdfIn PDF document text
    • https://cdn.sqhk.co/bojodunaluko/hh4S4ii/69620262469.pdfIn PDF document text
    • http://f1l3download.site/beeswing_line_dance_countrywcvng.pdfIn PDF document text
    • http://fubikopelemom.mypressonline.com/57208084472.pdfIn PDF document text
    • http://yyyyyyhhhhh.space/fasawigufumukwgnz8.pdfIn PDF document text
    • http://yourbigdick.space/69222200749ntqs6.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
    • https://48e6b720-b653-4920-beb0-7ef171ab6ab9.filesusr.com/ugd/d9d1f5_8fde3d21f0ec4baf8138e94f3381f2a5.pdf?index=trueIn PDF document text
    • https://47e4df30-8702-49a4-8bd5-327e1546ff06.filesusr.com/ugd/379272_97c1463f4be740d7bbcf1e4b7f194390.pdf?index=trueIn PDF document text
    • https://141ebdc9-a3c9-4c6d-b8f9-366dbf139dec.filesusr.com/ugd/46bfb0_9dd180ae729745fe8ffbdeaa28add88e.pdf?index=trueIn PDF document text
    • https://411be8f8-4ba1-40b5-9edf-cc4a2c3d5ecc.filesusr.com/ugd/a86d68_891a138758f242bbac685675713c5a08.pdf?index=trueIn PDF document text
    • https://ff06b2c9-6223-4357-b4d5-1bf3807c749f.filesusr.com/ugd/717131_3268a191676c45b8ad35e909691e5b2b.pdf?index=trueIn PDF document text
    • http://wobanunep.myartsonline.com/10717319707.pdfIn PDF document text
    • https://2ddedb0e-b7b0-41c9-a8bc-c018bd0e6e4c.filesusr.com/ugd/70094d_b7a673ff0b2a4f0dbcf637ee5daae4eb.pdf?index=trueIn PDF document text
    • https://f8ba888e-8f71-4fde-8303-550399648f4e.filesusr.com/ugd/17ce20_17ac267eddbb416d96bf3dfe00956fe2.pdf?index=trueIn PDF document text
    • http://disoluje.myartsonline.com/nebew.pdfIn PDF document text
    • https://2f2ab42d-e0b4-4bd3-aa50-2430da1ff5fc.filesusr.com/ugd/eaf48f_840f7e205a4a44b39ea32dd48d1870b5.pdf?index=trueIn 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ffa1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFA1 3360 bytes
SHA-256: 808b5b28a1c6dc4bdd9eacad5b683e47e46dcb9d3c1faa43347acb2d00b3f428
font_01_sfnt_off00010b8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B8F 4928 bytes
SHA-256: 2bf31fdba93dd8bb4c009ebd299d691366cd3bd48bc64bb487646554fef8b904
font_02_sfnt_off00011c27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C27 11480 bytes
SHA-256: 760ff4867ea280cd10c7da8bc4945af5674d5bf9d55b877b0523330d9190fd9b
font_03_sfnt_off0001428a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1428A 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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