Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c305c287cbba2ad…

MALICIOUS

PDF

80.4 KB Created: 2021-03-11 18:46:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-24
MD5: f90894a442503657a1e76b6a71d9c0e9 SHA-1: 7aa181f878fc74f8b6a93762c879c691e6c1adf1 SHA-256: 6c305c287cbba2ad5e17ddfa7f46ea6d2f0960c6ede5d7f48051d097a0b4af60
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to potentially malicious sites. The document body, though corrupted, contains text related to 'Hamilton beach 8 cup rice cooker instructions', which is likely a lure to disguise the malicious nature of the document and its embedded links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://xajibur.ru/strik?utm_term=hamilton+beach+8+cup+rice+cooker+instructions PDF link annotation
    • https://cdn.sqhk.co/tobafixola/IqagiVa/std_10_gujarati_chapter_24.pdfIn PDF document text
    • https://cdn.sqhk.co/moxibusas/dq5Vdjg/sister_personal_safety_appliances.pdfIn PDF document text
    • https://sobemifukoku.weebly.com/uploads/1/3/4/8/134887972/munokumet_fotusa_wupoditaj_ponotalilexela.pdfIn PDF document text
    • https://cdn.sqhk.co/kagalitisup/wreqjh7/52089543830.pdfIn PDF document text
    • http://gudokav.sportsontheweb.net/estadistica_descriptiva_e_inferencial_cordova.pdfIn PDF document text
    • http://lorewipa.scienceontheweb.net/the_martian_movie_download_in_hindi_hd_720p.pdfIn PDF document text
    • https://cdn.sqhk.co/fusaduxuw/j4ljdjg/elune_tier_list_reve.pdfIn PDF document text
    • http://kirakexig.mypressonline.com/john_deere_214_for_sale.pdfIn PDF document text
    • https://norofuzalugegok.weebly.com/uploads/1/3/4/8/134882219/8775401.pdfIn PDF document text
    • http://vopugixeroramox.medianewsonline.com/photoshop_cs5_step_by_step_tutorial_for_beginners.pdfIn PDF document text
    • https://kasasifu.weebly.com/uploads/1/3/4/6/134697732/jumiximapaxave.pdfIn PDF document text
    • https://cdn.sqhk.co/vasibejovej/ghhfNqM/navneet_kaur_dhillon_movie_list.pdfIn PDF document text
    • https://cdn.sqhk.co/suwojixuwebi/FtzIohj/96444068765.pdfIn PDF document text
    • http://vurejowug.mypressonline.com/5178546509.pdfIn PDF document text
    • https://xupajipodiburut.weebly.com/uploads/1/3/0/8/130814024/dabib.pdfIn PDF document text
    • https://xaforegitada.weebly.com/uploads/1/3/1/4/131413040/5c60f03baa.pdfIn PDF document text
    • http://levotavo.scienceontheweb.net/sesilam.pdfIn PDF document text
    • http://kirakexig.mypressonline.com/86195208383.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jotudokizer.onlinewebshop.net/wastewater_reuse_and_management.pdfIn PDF document text
    • https://6b137298-3864-41c5-aaa3-11744000c3c2.filesusr.com/ugd/b916f4_f3a5e4e69f054de5a167004e4be99911.pdf?index=trueIn PDF document text
    • https://e8b83640-91e4-44a0-a69f-c2468797902f.filesusr.com/ugd/ee4a13_26318e51edd544818de307a5e14f93e0.pdf?index=trueIn PDF document text
    • https://493f174a-a540-412c-bacb-e5b7b26cbfcf.filesusr.com/ugd/95bb70_ac98752d5db24fb1ab86ec1e60282bb1.pdf?index=trueIn PDF document text
    • https://5c90cfa9-af55-48e2-9430-1f3580382729.filesusr.com/ugd/e2b09b_0ac5aa34bbf44c63824e7cdf5651d505.pdf?index=trueIn PDF document text
    • https://6b2f37ea-3696-4b87-858b-663c379f6f6f.filesusr.com/ugd/16879a_cfcdd14406184fbfa1104e891d2728f6.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_off0000fb6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB6F 5532 bytes
SHA-256: bf680400aaebc9ea24eef307d46ee0cf1cdd1ae4a0d4f20ada69aa4fe523e587
font_01_sfnt_off00010e07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E07 11236 bytes
SHA-256: 82024f5067bc2bf6ae7b7ee352b2c28a1857262a09ad323f778bf3f01c1dda50