Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c63f8a5d19f2f71…

MALICIOUS

PDF

93.5 KB Created: 2021-03-19 10:17:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: d54e88222dc98e82a37ec6c9a1ee5e62 SHA-1: bdd75f5eb90fd36d8ea38a6135ceca17a6c2881c SHA-256: 5c63f8a5d19f2f717878d20f70ef8f54752b0a0c426f9d642166737ed026fe62
186 Risk Score

Malware Insights

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

This PDF file contains numerous external links, many pointing to disposable hosting and exhibiting characteristics of a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or SEO abuse. While no scripts were directly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

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://ponafet.ru/wix?keyword=piano+tiles+unblocked+scratch PDF link annotation
    • http://tonojodozif.mypressonline.com/54164781395.pdfIn PDF document text
    • https://jukorupojos.weebly.com/uploads/1/3/5/3/135344641/b4cf306c3.pdfIn PDF document text
    • https://ranezilipevag.weebly.com/uploads/1/3/5/3/135392607/bifepodiza_vimazapazipaxe_nawemasebimoxed_kiberutevijo.pdfIn PDF document text
    • http://fuvidevifa.scienceontheweb.net/chattanooga_hydrocollator_manual.pdfIn PDF document text
    • https://xodimazu.weebly.com/uploads/1/3/1/4/131408168/3014763.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jedalavupu.epizy.com/9166990897.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6c385737-33be-4e54-a1e7-bee50f4d4b38/how_to_program_genie_1028.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1c57b411-553d-44ec-82c1-dc72f77908ac/how_long_to_cook_turkey_chili_in_crockpot_on_low.pdfIn PDF document text
    • http://virixavop.epizy.com/lajunitomodugadam.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2868d4d4-8a42-4182-a34e-a576e57f444a/somarejazon.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/89b191af-1fd9-474b-8637-ac710c72adbe/17518654557.pdfIn PDF document text
    • https://s3.amazonaws.com/foneniz/pioneer_appradio_firmware_update_sph-da120.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/08c1ef34-5846-4908-bc3e-84b0c0600c5e/15042175978.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/30019c29-1736-4ec4-8f95-50d38a2aa98a/what_is_a_strawman_argument_meaning.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/49a642da-bce7-44ab-b8bc-7f13921ba0a1/when_did_warcraft_3_reforged_come_out.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d5fa4239-e57e-434f-931e-1efc15ec32eb/how_long_to_cook_chicken_wings_in_masterbuilt_electric_smoker.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a9e43558-6041-4b49-9355-96d3e5bc7435/kazagune.pdfIn PDF document text
    • http://mofibukuzoke.rf.gd/canasta_regeln_2_spieler.pdfIn PDF document text
    • https://s3.amazonaws.com/bubisifapagefe/83596417913.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/07e7c20c-1cf1-4c0d-8c4d-83aa0ffd1e4b/ronco_rotisserie_chicken_recipes.pdfIn PDF document text
    • http://rapodipowunifo.epizy.com/nedomibugugetizapunato.pdfIn PDF document text
    • http://zitasixan.atwebpages.com/nofodefividibaduwuwoxe.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off000138eb.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x138EB 22552 bytes
SHA-256: 8df5a36020a87e7f88c56beee7f4f092ed3ce222f1e991e146ed61f591c6cdbc
font_00_sfnt_off0000f2c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2C5 5232 bytes
SHA-256: dd2e4e1eb69c2a840712dca28ed61e03f493d45938aef6a4097cf26293e969e0
font_01_sfnt_off0001047c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1047C 2216 bytes
SHA-256: f1746f4a41cd8ae07a1a679700ee4ecdaaaeca805ea49b87d942cba4734359f4
font_02_sfnt_off00010e8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E8D 13616 bytes
SHA-256: bda101d46c05853cf593ff9e17b1797654c9a04f607005065d659ead65a1b4dd
font_04_sfnt_off0001602d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1602D 1736 bytes
SHA-256: 74be5bc4d46f64e5c506ae1006f7022dc98ebf960e37c7bf417c2027ca73106d

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