Malicious PDF — malware analysis report

Static analysis result for SHA-256 233e25107927fdba…

MALICIOUS

PDF

76.5 KB Created: 2020-12-21 17:57:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-24
MD5: e07295103338a0d3013b71868794b489 SHA-1: 97c733a0a78bbfdef4aa0da34b68a15dc4d70d14 SHA-256: 233e25107927fdba37248b5c9401476e53b9b3275bcf22a11a2ce1894db1875f
244 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file contains numerous links, many pointing to disposable hosting and redirector services, indicating a link farm or phishing attempt. The presence of a link to 'traffine.ru' with a 'utm_term' parameter suggests a potential campaign. ClamAV and ML classifiers also flagged this file as malicious, supporting the assessment of a phishing or malicious redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://traffine.ru/123?utm_term=precure+a+la+mode+movie In PDF document text
    • https://static.s123-cdn-static.com/uploads/4417653/normal_5fc3fe2c6c2f3.pdfIn PDF document text
    • https://turikiripejuz.weebly.com/uploads/1/3/4/5/134501804/gaxefusogaz_wumasofezore_rupamajikolitev.pdfIn PDF document text
    • https://tibuvaji.weebly.com/uploads/1/3/4/7/134720571/rokuradekef.pdfIn PDF document text
    • https://namutaborizelo.weebly.com/uploads/1/3/4/7/134766338/67404b8ca5246f.pdfIn PDF document text
    • https://vosomomoratefuf.weebly.com/uploads/1/3/4/6/134614816/8404400.pdfIn PDF document text
    • https://dagojamigim.weebly.com/uploads/1/3/4/7/134763314/matijetef.pdfIn PDF document text
    • https://pikoxujedogusu.weebly.com/uploads/1/3/4/6/134665618/kawavorajefuzomepo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404123/normal_5fcdd124d4796.pdfIn PDF document text
    • https://mututekabifu.weebly.com/uploads/1/3/4/4/134466573/wibuwekepifa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/f6dd17a8-0319-4022-b899-73f160a01f0c/pujap.pdfIn PDF document text
    • https://s3.amazonaws.com/nimuwet/words_that_start_with_soc.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/77a11d02-b928-4e65-b282-c7b5c31334f1/dazadiriwupux.pdfIn PDF document text
    • https://s3.amazonaws.com/remeranexe/aeria_games_files_ava_csd_er.pdfIn PDF document text
    • https://s3.amazonaws.com/tojazudibumogab/aluminium_cladding_sheet_hs_code.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cdcf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDCF 2828 bytes
SHA-256: 5fccc4b93669808a911be510fa35354615011d06cae0a9a774c0ef2e9a75b465
font_01_sfnt_off0000d7d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7D9 4968 bytes
SHA-256: 9880f7926bfd914392eae00fcab5fed76e28853d1421ae073641d3e859a1199b
font_02_sfnt_off0000e8af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8AF 11164 bytes
SHA-256: 116f0cfe71ee51978b5098d5a269f044bc745b1c7791e694e555031e1db4832f
font_03_sfnt_off00010ecd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10ECD 16264 bytes
SHA-256: 8a5ff31d1b3facbd7819f20b556f851fe5b48750ce65606adf81ad4d8b0a33e6