Malicious PDF — malware analysis report

Static analysis result for SHA-256 0fe6942ee65f4281…

MALICIOUS

PDF

78.0 KB Created: 2021-03-19 12:21:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 5707c6aa12515f1acecf36827d6a5e81 SHA-1: 9012558839891270313611c9f83f6bbf17920863 SHA-256: 0fe6942ee65f42819ec65e767550f89cef3dc00d7680dc2b90996cb75677298c
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristic firings suggest it functions as a link farm, presenting numerous external PDF links, with one primary URL pointing to a potential phishing or malware distribution site. The 'SE_INVOICE_LURE' heuristic indicates the document's content is designed to deceive the user into clicking the malicious link, likely by impersonating an invoice or payment request.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://xezojetit.ru/123?utm_term=pdf+attachment+in+mail+merge PDF link annotation
    • http://taxiditugivubed.iblogger.org/80769953609.pdfIn PDF document text
    • http://lonagonem.22web.org/51209983337.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://769966b8-4adc-437e-bba8-f198cf6e171b.filesusr.com/ugd/41a0b6_f876afcfc3e540e78a1e80b4cee14394.pdf?index=trueIn PDF document text
    • https://ad843f61-c544-48d7-8cfb-3c048b9edb46.filesusr.com/ugd/0dd9ed_2a0d54e79c404c7d8df9244ea5f2d9c9.pdf?index=trueIn PDF document text
    • https://4e16d9da-0927-4957-8a4e-4544605d6055.filesusr.com/ugd/d7e550_1cd94790a8e24207971296284734b3a5.pdf?index=trueIn PDF document text
    • https://858e1da1-ad31-4e5b-aec0-89c59c6c71f6.filesusr.com/ugd/6240f8_2df8228207ba49ccbdfb397f4f12d2af.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xipavir/act_bubble_sheet_2017.pdfIn PDF document text
    • https://656adf98-7a81-40bd-8d0f-2b9c27d09201.filesusr.com/ugd/268ab1_2426214612154aa48e0e30757d49715d.pdf?index=trueIn PDF document text
    • https://f8d4b294-f952-4a11-85e8-0a3036f9bdaf.filesusr.com/ugd/ad8f3a_c42f4673283f4ff2945479b7aead6bc0.pdf?index=trueIn PDF document text
    • https://75a697d3-84f0-44cf-bab9-f05e37020c50.filesusr.com/ugd/7c3584_03f88fc8148245b2a9dc08d13833aa1a.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/5711ebfd-95b3-4e67-9c6a-6f29f86df001/is_galaxy_tab_s2_still_supported.pdfIn PDF document text
    • https://2571d5ef-7130-409a-b87d-c3fd18a83f30.filesusr.com/ugd/71fc55_de4ae763ac4b45978b38770c84c5966b.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/76c30645-06a6-4bb9-9638-b61ab4b46cc2/how_to_use_brentwood_frozen_drink_machine.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8c65ef34-cc9d-4057-9757-4138458ec468/lenovo_g50-80_specs.pdfIn PDF document text
    • http://gewofudi.rf.gd/teenage_mutant_ninja_turtles_and_other_strangeness_character_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/wixamupelinere/anbe_peranbe_official_video_song.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9d709921-bee3-423a-aa55-1de83097b8b6/vopoteru.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_off0000e7fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7FA 4936 bytes
SHA-256: bea99d716e3a373934550cb56611fe1cad45889877faf92001d419053ddbcb00
font_01_sfnt_off0000f885.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF885 10460 bytes
SHA-256: 4683e0b9f4a63b04e48bd13a770b7f2a52cc15a3e1df3039c9afbeeacecaced2
font_02_sfnt_off00011c69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C69 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

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