Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c64b6c32cd673a8…

MALICIOUS

PDF

79.3 KB Created: 2021-02-21 22:04:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 0b0e3619a9211fb75c2f540139af0648 SHA-1: 35701c2cefd59663036d2dfdfcdb1bc370be12e4 SHA-256: 6c64b6c32cd673a8ffa5dfef76b4419e2116df73ea1a3445d38edb1b46f6de74
156 Risk Score

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 5

  • 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.
  • 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://bologen.ru/wix?keyword=lifetime+fitness+rockville+maryland PDF link annotation
    • http://smeh-mif.space/tomb_raider_movie_2018_castqw1p5.pdfIn PDF document text
    • http://santecmb-sarl.com/660484995214luys.pdfIn PDF document text
    • http://salestore.pro/894398009765kdla.pdfIn PDF document text
    • https://tasoxagizuj.weebly.com/uploads/1/3/4/7/134734804/2b290c1.pdfIn PDF document text
    • https://wopuwidutava.weebly.com/uploads/1/3/5/3/135322166/vifonudose.pdfIn PDF document text
    • http://everydayy.fun/flight_release_dates_for_december_20208d4pk.pdfIn PDF document text
    • https://cdn.sqhk.co/govazilose/Ajghjro/35769713316.pdfIn PDF document text
    • https://gusoberususot.weebly.com/uploads/1/3/1/4/131454899/2826525.pdfIn PDF document text
    • https://cdn.sqhk.co/ropobemuma/haF1Vjg/can_you_escape_2_level_24.pdfIn PDF document text
    • https://cdn.sqhk.co/jumibizede/dkdsIhj/bokosaju.pdfIn PDF document text
    • https://cdn.sqhk.co/vanewano/ijLhf60/consultar_mi_saldo_at_t.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/dusined/89414608768.pdfIn PDF document text
    • https://s3.amazonaws.com/tarizirefevifab/68764241236.pdfIn PDF document text
    • https://s3.amazonaws.com/woxewiwupir/10346413325.pdfIn PDF document text
    • https://s3.amazonaws.com/mawesenasijoser/beterschap_kaarten_en.pdfIn PDF document text
    • https://s3.amazonaws.com/nufidibodudulad/fnma_appraisal_form_1007.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e426.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE426 5332 bytes
SHA-256: 1f46087b847dab69d6fa32f5bf49073671c1cf6741133da0c6d43ecb6d8492ba
font_01_sfnt_off0000f64f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF64F 10656 bytes
SHA-256: d3e1ba811444ab55b8d22334e6a42c5fea90426c133b56d05a87290ae73e9e70
font_02_sfnt_off00011adc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11ADC 16176 bytes
SHA-256: ba4b7fcdf0d9488ca0376167b795149aae2c8691ace432a29a1c8cf2f5aeb833

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