Malicious PDF — malware analysis report

Static analysis result for SHA-256 32f29dccd3ccf31e…

MALICIOUS

PDF

76.1 KB Created: 2021-04-03 09:18:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: ba8d83688c6ebf468b3524cc010aa1f1 SHA-1: dd8eec51abfacb93aa2fd4b7f5b8010516ecaaeb SHA-256: 32f29dccd3ccf31e56960a25c005ee868802443ef27d2b028335757eef84da88
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, containing numerous external links to other PDF documents, likely for SEO manipulation or to distribute further malicious content. The presence of a 'utm_term' parameter in one of the URLs suggests a potential phishing or marketing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://jottigo.ru/123?utm_term=fortinet+fortigate+100e+datasheet PDF link annotation
    • https://wulapoledonuker.weebly.com/uploads/1/3/2/6/132695240/tejunidalefibiwuduse.pdfIn PDF document text
    • https://sileperu.weebly.com/uploads/1/3/1/4/131406390/domepotuva-gawide.pdfIn PDF document text
    • https://fulopovesaj.weebly.com/uploads/1/3/0/7/130740112/80efc5e632fb1.pdfIn PDF document text
    • https://tuxakosubulep.weebly.com/uploads/1/3/4/0/134012578/5916742.pdfIn PDF document text
    • http://profer-opt.ru/gardenia_malaysia_annual_report_2014ulty4.pdfIn PDF document text
    • http://mysteps.online/71922320f1g1n.pdfIn PDF document text
    • http://tibagisuminove.sportsontheweb.net/82679370666.pdfIn PDF document text
    • https://lasuresupaka.weebly.com/uploads/1/3/2/6/132683400/lerur.pdfIn PDF document text
    • http://circus.market/semimorupizijubccm4.pdfIn PDF document text
    • http://xikisavi.scienceontheweb.net/chemistry_dictionary_free_download.pdfIn PDF document text
    • http://good-production18.site/wogakuvufomakupcr3.pdfIn PDF document text
    • http://faceskinagainbeauty.xyz/how_many_companies_use_awsrti4u.pdfIn PDF document text
    • https://resudejo.weebly.com/uploads/1/3/4/4/134471902/kovuvobabenaka_wudus_vopugifudapuf_rukab.pdfIn PDF document text
    • https://gazumewus.weebly.com/uploads/1/3/4/9/134901575/gigefopubi.pdfIn PDF document text
    • https://nitesefoxon.weebly.com/uploads/1/3/1/4/131453907/xugeme.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cf176ec6-4820-456b-adf9-61e5f06c968f.filesusr.com/ugd/43d598_c3fe85cc4fd343a4bb7524222763aca9.pdf?index=trueIn PDF document text
    • https://30dce114-5b7d-4ba4-aa44-e083516804ec.filesusr.com/ugd/7de0fd_4f776f10e5c34d41ac326f73e7d02e74.pdf?index=trueIn PDF document text
    • https://356bbf58-84af-4bff-99a9-d03346e46411.filesusr.com/ugd/b5472a_31d3908cd43644ce90455c3ba8015c96.pdf?index=trueIn PDF document text
    • https://5f1c1209-45f6-45c0-988a-e0aaa04be055.filesusr.com/ugd/ba5820_832e93c82eb54d22980faf0758d449d1.pdf?index=trueIn PDF document text
    • https://d6504552-49b0-4b7d-b1ff-94f9e1082b83.filesusr.com/ugd/1f0558_84c04cfec75848438072663268ed362e.pdf?index=trueIn PDF document text
    • http://nojikigor.myartsonline.com/10840286650.pdfIn PDF document text
    • https://8aefc570-8454-48c3-bb63-d4d1067b7ce0.filesusr.com/ugd/5c9621_cf69343d487848f4966c44c1f6cb8402.pdf?index=trueIn PDF document text
    • https://5e54824a-8208-41b0-8aeb-7c017e8cfb46.filesusr.com/ugd/f64db8_7d5c1bca557249af82398471aa6131bd.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_off0000ece9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECE9 5284 bytes
SHA-256: 3b204f5f143a48813df7bbb1eee6996e500f8aab549314778ad82295973a027c
font_01_sfnt_off0000fee4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEE4 10624 bytes
SHA-256: 220642c1a6949104ceb52b3aa6e999c676bce9873966338f504c2f4869b7c76f