Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb093cc0e599a224…

MALICIOUS

PDF

99.4 KB Created: 2021-04-05 05:55:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 62089625bc2c745d3baec908a9f34288 SHA-1: 856393699c08a922e8f2e3df552b8fe60af77e03 SHA-256: fb093cc0e599a2249d4f5020ef2c02c48fe2aac6e17f361da4d2c77750f7c1b6
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment 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 0.9992

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://dugedepap.ru/wix?keyword=minecraft+online+unblocked+mobile PDF link annotation
    • http://kizunawinim.getenjoyment.net/lubajurezesefobiwof.pdfIn PDF document text
    • http://rogevunesopu.medianewsonline.com/how_to_draw_manga_girl_poses.pdfIn PDF document text
    • http://rixadixiji.scienceontheweb.net/30752981638.pdfIn PDF document text
    • http://pimifawimonidij.mywebcommunity.org/bacterias_aerobias_ejemplos.pdfIn PDF document text
    • http://xunopapazugatar.medianewsonline.com/86583601084.pdfIn PDF document text
    • http://paruxezogu.mygamesonline.org/koziluzumaxulomek.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wopojofa.atwebpages.com/41603270824.pdfIn PDF document text
    • https://ac4cd5cf-e861-4b1b-a585-e47049f737a6.filesusr.com/ugd/843280_575fe2fda5024cee96f012f934939ce6.pdf?index=trueIn PDF document text
    • https://cd753cf5-d90a-4073-9c55-931a76e81761.filesusr.com/ugd/8826df_82a9bb0d6a8b4a6980b9456a300f3e0a.pdf?index=trueIn PDF document text
    • http://pulutugorivexek.atwebpages.com/63978243335.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/389f97c2-5548-475d-a802-bcd574761b68/did_economics_drive_imperialism.pdfIn PDF document text
    • https://84d655c4-d84a-4a0c-9c32-0387925bd622.filesusr.com/ugd/6233da_54b4174f27d64155807590984e10ce6b.pdf?index=trueIn PDF document text
    • https://f6ce3cfb-f922-470c-9e0e-eaf724001b0e.filesusr.com/ugd/defcb2_d05b1e93ffdb4b4db39035c4b44b947c.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/0807edd8-d31a-4bd7-aa21-ab87c9000373/whats_the_menu_for_burger_king.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1b668b5d-c7c4-4a0d-9d75-3778202e2a7b/how_long_can_a_100_amp_battery_last.pdfIn PDF document text
    • https://f89b8795-a90f-4359-81e0-6309601a98d9.filesusr.com/ugd/8e7730_81853bf341ae44d98262e143a18eaf25.pdf?index=trueIn PDF document text
    • http://jadivepijuga.myartsonline.com/cambridge_igcse_mathematics_practice_book.pdfIn PDF document text
    • https://4407eba0-147d-4e9d-98ff-19010b67f466.filesusr.com/ugd/c1f2fd_1a0edf55fb084509917618cff279651e.pdf?index=trueIn PDF document text
    • http://fabedidatifi.onlinewebshop.net/electric_scooter_repair_san_diego.pdfIn PDF document text
    • https://368051e9-4199-40ea-b9a2-dc6e6f83cb3b.filesusr.com/ugd/6260fe_1fcb766518864b5485b79b294a6419e1.pdf?index=trueIn PDF document text
    • https://79e8b926-cc52-4cef-90ae-68e3990d752e.filesusr.com/ugd/694d5d_3e18cc19fa1a41f48d839632d26581f6.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/2720ead2-2d0e-4513-ad08-2295bdf9cbbc/olympus_vn_7200_download_to_computer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3801d1ed-18ee-4bc4-9386-83da7a51a531/ramojanalodo.pdfIn PDF document text
    • https://769966b8-4adc-437e-bba8-f198cf6e171b.filesusr.com/ugd/41a0b6_aca29bb525774fec83a9ebc7a2d72f34.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000146fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x146FA 5196 bytes
SHA-256: 6165c90d2d0e2a90720cb046b014c414bdaf422ba8c2db3f14495e102e28544d
font_01_sfnt_off000158a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x158A0 11628 bytes
SHA-256: 24ebb1c148c5446961df53eda5a9fd8cd64074b306c59dce934c9b18d17354ee