Malicious PDF — malware analysis report

Static analysis result for SHA-256 9904f69eee36f744…

MALICIOUS

PDF

77.9 KB Created: 2021-03-10 06:25:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 1cb61e1ef2e771166c54f1d40b280217 SHA-1: e15f41c72455efd275971d053e5c807e04edd353 SHA-256: 9904f69eee36f744188a3c6be65483d16d4fc50ffba04a6ed79e2bf7356881a3
156 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9993

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 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.
  • 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://lozipotod.ru/award?keyword=adjectives+with+examples+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4420260/normal_6040f5a2867f1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420459/normal_5fcafdf72c3af.pdfIn PDF document text
    • https://cdn.sqhk.co/jedelamodafa/XLR2sd6/xigovexonazigixixonudedo.pdfIn PDF document text
    • https://cdn.sqhk.co/futogifoku/ujaVjfU/beard_trimmer_with_vacuum_walmart.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380707/normal_5fe8ffc1849d8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470389/normal_6002e7070bc1c.pdfIn PDF document text
    • https://cdn.sqhk.co/nopawuwam/TMXhgVc/82810534197.pdfIn PDF document text
    • https://cdn.sqhk.co/dedejosewor/aETt1jg/warplanes_ww1_sky_aces_apk.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4466996/normal_5feccbb6ca064.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/nevovumowa/bus_interface_unit.pdfIn PDF document text
    • https://52a72965-a6d2-471e-b66a-59a59a4d663b.filesusr.com/ugd/e643da_c39c269d500f4af48c58bb9983d98ba0.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tazopaju/afrikaanse_christelike_musiek.pdfIn PDF document text
    • https://89d9876f-4e47-4433-ab5b-8da47ae3ae5c.filesusr.com/ugd/37c326_45bfac17fe9c45ac9a0567d4e10c663d.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/pewebopufupe/5110476984.pdfIn PDF document text
    • https://f405dec1-7f90-4f4c-a861-5286f67d0127.filesusr.com/ugd/ab922d_ee1556b7bfed4605b54ab157170b6a5f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/mejawiwomak/96155756128.pdfIn PDF document text
    • https://s3.amazonaws.com/jimugivos/95453893475.pdfIn PDF document text
    • https://s3.amazonaws.com/libowebujakux/zudamuzitenufox.pdfIn PDF document text
    • http://bagugexasorip.myartsonline.com/54850494847.pdfIn PDF document text
    • https://s3.amazonaws.com/vanatul/25393094179.pdfIn PDF document text
    • https://98350ace-7ac4-4f38-a9d9-579fdad8050b.filesusr.com/ugd/9b2d9b_e48e06c4734c4d2c8872607441cfe1d1.pdf?index=trueIn PDF document text
    • http://zonafikepejese.onlinewebshop.net/beberawowadu.pdfIn PDF document text
    • https://dbb1fad9-9c05-458f-9e32-bc0b7f65d7ec.filesusr.com/ugd/451461_0f5a327f6cba4c3aa84e0c45b077b6e6.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_off0000f48f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF48F 5584 bytes
SHA-256: 8b5b719abf6cc69c2c45c63c725abe18a310f622eeefc092e9d697876b1d148b
font_01_sfnt_off0001078c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1078C 10284 bytes
SHA-256: 9f0e62e4f6209046fb7ef98d8f67dd7ee9f14c9901efcd1fdc01b4e205d69e0d

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