Malicious PDF — malware analysis report

Static analysis result for SHA-256 710fc9980061793d…

MALICIOUS

PDF

74.9 KB Created: 2021-03-03 16:46:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: f81966480a942515723b301cb68a2803 SHA-1: 949160f3c1a9a799b1bfe2d1d316c59ab3d63351 SHA-256: 710fc9980061793d24312b772ab6c0da9a87b19a36432d94784dd960eed34481
186 Risk Score

Malware Insights

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

This PDF file contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing operation. The presence of a URL with a 'utm_term' parameter related to 'logitech m325 driver windows 7' indicates a lure to trick users into visiting malicious sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for malware distribution or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://midufefew.ru/strik?utm_term=logitech+m325+driver+windows+7 PDF link annotation
    • http://shop-onlinediscount.xyz/the_cask_of_amontillado_reading_comprehension_questionsf5p49.pdfIn PDF document text
    • https://xaminipa.weebly.com/uploads/1/3/1/0/131071220/kaxogudomuxone-jeninofafunuzaw.pdfIn PDF document text
    • https://lilexoben.weebly.com/uploads/1/3/5/3/135331811/wudikep-kejodipixidid-mejer.pdfIn PDF document text
    • https://juwabizaf.weebly.com/uploads/1/3/0/9/130969053/xawukotologo.pdfIn PDF document text
    • https://zedimubaxujejit.weebly.com/uploads/1/3/4/7/134715534/guworujimujajukijel.pdfIn PDF document text
    • https://gifetapajuloper.weebly.com/uploads/1/3/4/6/134682222/ca697f18c8afbc3.pdfIn PDF document text
    • https://komomofuxuz.weebly.com/uploads/1/3/4/4/134494735/rukumugaga.pdfIn PDF document text
    • https://pevarigemi.weebly.com/uploads/1/3/5/3/135303959/xetomofifebuk.pdfIn PDF document text
    • https://mitigovoponezix.weebly.com/uploads/1/3/4/3/134375948/f01d4.pdfIn PDF document text
    • https://rizebilawi.weebly.com/uploads/1/3/0/8/130814716/tunudazijaw-rasodawepi-pokuzelebag.pdfIn PDF document text
    • https://rumuzejisu.weebly.com/uploads/1/3/5/3/135349165/e4dd8e8046e.pdfIn PDF document text
    • http://storergoods.site/dias_festivos_de_marzo_2020_mexicokoisy.pdfIn PDF document text
    • https://wujipiledulom.weebly.com/uploads/1/3/4/6/134695719/cd4b78cd8ee9.pdfIn PDF document text
    • https://nifirasevaxo.weebly.com/uploads/1/3/4/7/134756957/9558736.pdfIn PDF document text
    • http://zoluwofemofuper.sportsontheweb.net/how_to_fix_treadmill_e1_error.pdfIn PDF document text
    • http://nazhivy.net/56275648373ayl1x.pdfIn PDF document text
    • http://ital-tess.space/tulatewakovarasuravijimarf5c52.pdfIn PDF document text
    • http://suvuxivenorum.mypressonline.com/who_pays_the_settlements_on_judge_judy_show.pdfIn PDF document text
    • https://xosulokut.weebly.com/uploads/1/3/4/4/134466674/8560241.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000e6ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6EF 5704 bytes
SHA-256: 6ff5505c16a81b5f168bc9db265ff0cddc23bea12f5f50cfa111a8c229bebcd3
font_01_sfnt_off0000fa54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA54 10616 bytes
SHA-256: 1b1c62e89e1a485356fff1378723f55234e32b18b0dcbfb4333fa845cff53641

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