Malicious PDF — malware analysis report

Static analysis result for SHA-256 05f821702168f00f…

MALICIOUS

PDF

121.9 KB Created: 2021-03-28 17:34:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 9a9a3757e2c71be9e78856ca10cb2e50 SHA-1: 11032bb0348cb44a227610036f5a73db7c65f73f SHA-256: 05f821702168f00fba80dac9ced75401de33c134cd2aad5442ace08a44fdbbe3
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, many of which point to disposable hosting and are used in a link farm, suggesting a phishing or malware distribution scheme. The document body, though heavily obfuscated, appears to be a lure related to an IPCC report citation, designed to trick users into visiting these external links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 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://golowaki.ru/123?utm_term=ipcc+report+2019+citation PDF link annotation
    • http://hempmap.ru/symbol_scanner_configuration_barcodesn3soa.pdfIn PDF document text
    • http://worldworkbook.com/music_comptine_dun_autre_eteoafs9.pdfIn PDF document text
    • http://prechambre.xyz/wowivikfqn8.pdfIn PDF document text
    • https://cdn.sqhk.co/vorowobenune/pQjijhU/kobapojumisiveror.pdfIn PDF document text
    • http://pek-24.cc/modeleteraofd8b.pdfIn PDF document text
    • https://cdn.sqhk.co/fugolamudara/JW3majf/nerosaveziwigajelen.pdfIn PDF document text
    • http://odemebayisitrafik.com/emporea_fan_pager7v5y.pdfIn PDF document text
    • http://cardioactiveitalia.site/suvukiweruradut.pdfIn PDF document text
    • http://golesaluwo.66ghz.com/arb_air_locker_service_parts_manual.pdfIn PDF document text
    • http://paktum.pro/21027977411ua0gu.pdfIn PDF document text
    • http://copyrightshelpscenters.com/maketogawibemotite3o3cp.pdfIn PDF document text
    • http://cloudmarket.website/kangertech_evod_vape_pen_instructionswyl28.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://renebizokav.epizy.com/43179484520.pdfIn PDF document text
    • https://b9a4c3d6-4ccf-4d04-9b0f-c2e9c357e15d.filesusr.com/ugd/e5cbe5_18cafb5cc34740fdb4f32f0c8f7d288f.pdf?index=trueIn PDF document text
    • https://d896c2b7-539c-4146-aa8a-b39d26e096d8.filesusr.com/ugd/a98ecc_66b61c42deab45e79a2e36341a1cc9ad.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/90c990da-6dc7-4cb8-9e52-69b3c9e3fc39/merry_go_round_poem_langston_hughes_analysis.pdfIn PDF document text
    • https://a39ac558-8fe8-437d-9e10-dc9402d6cb9c.filesusr.com/ugd/1ebe14_e4f1c2be0e054f29ba3647a817da0c5e.pdf?index=trueIn PDF document text
    • https://ab9101c8-a046-40a0-ba79-761bab9f3367.filesusr.com/ugd/61fb7c_15ad01eaf5834bb882269b806283b70a.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/b6995d3e-3f64-4dc7-a71d-52bb5384d3e2/how_to_get_a_helicopter_in_gta_v_cheat_codes_pc.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e9a2adc0-9a15-42b8-be01-7fd7b6bd07aa/tidij.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dad1fea1-7bef-4166-a3f9-a4d4eaff2d25/petsafe_radio_fence_manual.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00019ff2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19FF2 5136 bytes
SHA-256: 97e87e50956c5f0a5beb72a469a2e0edbb2603eb29eb176262b2fbd9d698cc56
font_01_sfnt_off0001b17c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B17C 12272 bytes
SHA-256: 514d3b0090288667cda43515d8d6244031cccf8282c1ca46c956bc70e3b65f8f

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