Malicious PDF — malware analysis report

Static analysis result for SHA-256 754c4cdbff45c3ba…

MALICIOUS

PDF

112.8 KB Created: 2021-03-17 21:24:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: cceb814fe42066bf485b29287f45a5d1 SHA-1: 2126aaf23fbcdcba0a120a8979d3eba99ec494c9 SHA-256: 754c4cdbff45c3baecb8a10dc2fe979c8afdaf3642a14b276ca876ba4e676357
186 Risk Score

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 0.9990

Heuristics 6

  • 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.
  • 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://gimoguvi.ru/wix?keyword=bmw+e60+workshop+manual+free PDF link annotation
    • http://file-id.ru/vmc_treble_hook_replacement_guideuz0wn.pdfIn PDF document text
    • http://xakubilowiva.22web.org/outlook_create_new_email_template.pdfIn PDF document text
    • http://merovew.xyz/convertir_decimales_a_fracciones_ejercicios_resueltosdu05f.pdfIn PDF document text
    • https://cdn.sqhk.co/wobuwaseja/b0hVR2u/relic_runners_amazon.pdfIn PDF document text
    • http://fullcreditreport.info/template_kalender_2020_cdr_x4qzetf.pdfIn PDF document text
    • http://xarovinuvego.22web.org/what_is_gartner_magic_quadrant_2020.pdfIn PDF document text
    • http://faceskinagainbeauty.xyz/sportspower_trampoline_14ft_instructionsqscy2.pdfIn PDF document text
    • http://bodinimat.iblogger.org/send_attachment_in_mail_using_php.pdfIn PDF document text
    • https://cdn.sqhk.co/vexorikodo/jdhbihj/abcd_full_movie_in_tamil.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://91e55214-10ad-44cf-a10a-60a9392df58b.filesusr.com/ugd/e1c37d_71f16c5d20914adfb3ff241792ce5187.pdf?index=trueIn PDF document text
    • https://1e16f6d7-285b-4488-bf07-d3e24ac90e20.filesusr.com/ugd/417718_e6ec302f08e34e04aa6bfda928d83b9e.pdf?index=trueIn PDF document text
    • https://5862e4ea-63a6-4c92-af93-e06d02d1a664.filesusr.com/ugd/eaa371_a967bdc09f7a456a975c40ed6a274010.pdf?index=trueIn PDF document text
    • https://3a0d5408-2ea1-4258-8d29-5d96341cad2c.filesusr.com/ugd/79cb75_d0c667a571864bb1ab59ef435d7565d1.pdf?index=trueIn PDF document text
    • https://e0eedba4-cf99-4c42-97f5-d3f9ae5832dd.filesusr.com/ugd/e36ea7_3762d110084b4948ad17a334adddbdd4.pdf?index=trueIn PDF document text
    • https://85fc0914-20e3-4f1c-be8c-de7e6f89f47e.filesusr.com/ugd/a44510_ea50105633fc4f8f829f4a9657b5f086.pdf?index=trueIn PDF document text
    • https://06ebba1c-c738-45d4-b58d-83edbdcc9420.filesusr.com/ugd/b14caa_1c3b6ae69930422286d7e0250a037647.pdf?index=trueIn PDF document text
    • http://bonubenevutura.epizy.com/59609904648.pdfIn PDF document text
    • https://2ed821ec-8078-4e74-b11b-c5cec6a88262.filesusr.com/ugd/65e777_fca7902260064d259e2121646959e248.pdf?index=trueIn PDF document text
    • http://kesugoda.rf.gd/bufibox.pdfIn PDF document text
    • https://11f44e1d-c86f-4be6-baa1-90970e7c24f5.filesusr.com/ugd/a298ce_ff6b561117554704936b71bafe5817f0.pdf?index=trueIn PDF document text
    • https://80820154-e864-4b0c-832b-212b24169927.filesusr.com/ugd/c12414_53f649549b424c24988fb06effbc0de3.pdf?index=trueIn PDF document text
    • https://e1d5fa5a-667c-4d22-bb72-2ec96b4ed0f7.filesusr.com/ugd/01f30d_bcf743252e5247a8a13636a52403aa87.pdf?index=trueIn PDF document text
    • https://297de083-771a-4730-a3b8-a2afe8c7d209.filesusr.com/ugd/47424f_f10d5eb8a2bd4e79a1943fd2e5f2187a.pdf?index=trueIn PDF document text
    • https://33edd578-4186-4695-89f3-f56a5a23fc53.filesusr.com/ugd/f17c08_ee981ff0a91a44989700a7c4857529ce.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_off00017aa2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17AA2 5644 bytes
SHA-256: 11c3bac1dc7e4d5cd9365db0d9767db872b81f1f991ad1080eff58493efffc5d
font_01_sfnt_off00018db9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18DB9 11072 bytes
SHA-256: 19a98d425386a95fd11949fba6f9a6b4596516e38049bc34a3f7d7efd188d735