Malicious PDF — malware analysis report

Static analysis result for SHA-256 00c0cac21823feb5…

MALICIOUS

PDF

76.4 KB Created: 2021-02-19 12:17:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: f5fd3836c2030ffa33f0b822b1076c68 SHA-1: 849fecd8c02916ac59af12ec7913a0b55f301102 SHA-256: 00c0cac21823feb5f99ae75b046ddff4476da71ad9adaa38a9658bbfd58046b3
186 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9998

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://druttle.ru/123?utm_term=how+to+clean+a+keurig+with+vinegar+video PDF link annotation
    • https://belexikezetuvom.weebly.com/uploads/1/3/0/7/130775063/dobukiw.pdfIn PDF document text
    • https://nosisakapu.weebly.com/uploads/1/3/4/7/134773138/f096ea02c708728.pdfIn PDF document text
    • https://cdn.sqhk.co/pavoraxebute/jegjOvi/police_traffic_racer_game_download.pdfIn PDF document text
    • https://cdn.sqhk.co/gupuwiwi/ieiaXhe/small_rechargeable_flashlights_for_sale.pdfIn PDF document text
    • https://cdn.sqhk.co/rojarimeg/lohfjjL/the_crossings_golf_richmond_va.pdfIn PDF document text
    • https://cdn.sqhk.co/pemanunid/ihLVgcv/66859936316.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484380/normal_5fcd6f911cf4a.pdfIn PDF document text
    • https://latowinu.weebly.com/uploads/1/3/4/5/134508675/4322760.pdfIn PDF document text
    • https://wufipalowev.weebly.com/uploads/1/3/4/5/134595621/tagewa-lubiwuvufafive-sakekov-zesugimidafibi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455183/normal_5fd60ce7784c5.pdfIn PDF document text
    • https://kemavejikokawi.weebly.com/uploads/1/3/2/3/132303077/3fb43da6.pdfIn PDF document text
    • https://dipalowijoje.weebly.com/uploads/1/3/0/9/130969855/d28fa.pdfIn PDF document text
    • https://turarizamagux.weebly.com/uploads/1/3/1/4/131453837/jixuduwuwifomu.pdfIn PDF document text
    • https://tonituligavu.weebly.com/uploads/1/3/4/8/134884188/7312360.pdfIn PDF document text
    • https://loniforuwo.weebly.com/uploads/1/3/4/9/134904684/8050697.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://piterar.epizy.com/jupiguwis.pdfIn PDF document text
    • https://s3.amazonaws.com/vabedafozo/stardew_valley_bundle_spreadsheet.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e018.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE018 5080 bytes
SHA-256: 920b82a84e2daad65c02f3b826fa2d3b61760ed5ad202713d22feff27548a585
font_01_sfnt_off0000f165.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF165 10744 bytes
SHA-256: e0737a43b502781ef0026bb3a535c879f0a94dbd0dd3aff0265c14dc68419b9f
font_02_sfnt_off000115f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115F4 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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