Malicious PDF — malware analysis report

Static analysis result for SHA-256 14dd9405b7e84597…

MALICIOUS

PDF

66.9 KB Created: 2021-04-04 20:55:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 94d041c8659770d3abe6ef5f2e3d7967 SHA-1: 203b6ca7658815e9046ef3b50c4e8c269e9636ac SHA-256: 14dd9405b7e84597c356c1c3aac937c7effe67273736d5652812b4d2caf7f4cc
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by 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 0.9998

Heuristics 5

  • 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://jumiwimov.ru/123?utm_term=bootstrap+4+cdn+starter+template PDF link annotation
    • http://agent-ritual495.online/champion_dual_fuel_generator_7500_reviews5685u.pdfIn PDF document text
    • https://cdn.sqhk.co/bujasugawo/gdsjfjj/paris_texas_filming_locations.pdfIn PDF document text
    • http://item-mask.top/584187861696kxh.pdfIn PDF document text
    • https://famogapev.weebly.com/uploads/1/3/1/6/131606489/mujekiregog.pdfIn PDF document text
    • https://cdn.sqhk.co/netimupoxojo/Phehggc/1055519445.pdfIn PDF document text
    • https://cdn.sqhk.co/kuniremolu/rl1gfhd/32762247515.pdfIn PDF document text
    • https://xoxujodega.weebly.com/uploads/1/3/4/3/134363828/da6602f8.pdfIn PDF document text
    • https://sozogamawi.weebly.com/uploads/1/3/1/6/131636736/856750.pdfIn PDF document text
    • https://cdn.sqhk.co/porosobof/egjihzg/zesizafovenijeza.pdfIn PDF document text
    • https://cdn.sqhk.co/wemopizajazo/EDVMQgi/street_racing_death_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/falupuvevore/chfijhi/gaporet.pdfIn PDF document text
    • https://cdn.sqhk.co/womafafowix/hesqFTz/funozosefuj.pdfIn PDF document text
    • http://eurofamily.pro/36395779533tlag9.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dumurosaderured.rf.gd/autonomous_robots_george_bekey.pdfIn PDF document text
    • https://s3.amazonaws.com/firudegix/68793560644.pdfIn PDF document text
    • http://kuxogazixup.rf.gd/list_of_aerobic_bacteria.pdfIn PDF document text
    • http://dukizovisepo.rf.gd/fl_studio_12_download_for_pc_windows_7.pdfIn PDF document text
    • http://wetebufub.rf.gd/tebogagubenevoxibozedut.pdfIn PDF document text
    • https://s3.amazonaws.com/mikibetiv/carers_support_grant_form_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/besafefaf/vaaste_video_song_hdyaar._com.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_off0000c073.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC073 5356 bytes
SHA-256: 676db2e8e0afaaf8b371b6ee84e1a1c40c83c80d9ee830c90a15788d340d9b8e
font_01_sfnt_off0000d291.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD291 1800 bytes
SHA-256: a36eee06fef6ce219692c4ec918276ac99413e4fd1e3666e4031624f9289d620
font_02_sfnt_off0000db1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB1D 9628 bytes
SHA-256: 8416c7cc8c0193afe021931bf680d97a2ed616d8c2f16679467c82cbb0b7fe30

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