Malicious PDF — malware analysis report

Static analysis result for SHA-256 9cb14e4e7aa232ce…

MALICIOUS

PDF

73.0 KB Created: 2021-02-26 21:31:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 56f3c0b7949282e0ca515b49ab1811e0 SHA-1: 574889c30474e113de2a10d70127133aa659f1a9 SHA-256: 9cb14e4e7aa232ce92ede5bea7ef5df108df6394ba9c53578f3b4a9b7c273394
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with several pointing to suspicious domains and identified as part of a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The document body, though heavily obfuscated, contains text related to the embedded URLs, reinforcing the lure.

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 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/strik?utm_term=another+word+for+touchy-feely+relationship PDF link annotation
    • http://damvglaz6.xyz/37882387383al4pt.pdfIn PDF document text
    • http://vubitim.sportsontheweb.net/83913097461.pdfIn PDF document text
    • http://dakisemakegag.sportsontheweb.net/avatar_comics_imbalance_read_online.pdfIn PDF document text
    • http://smallita.space/sas_essentialshlwhr.pdfIn PDF document text
    • http://mobeditobaxul.scienceontheweb.net/91564270823.pdfIn PDF document text
    • http://limons.space/baton_rouge_business_report_top_100_companiesq8fzs.pdfIn PDF document text
    • https://wisowoturap.weebly.com/uploads/1/3/1/4/131453432/9739510.pdfIn PDF document text
    • http://dafagaketa.sportsontheweb.net/16312623847.pdfIn PDF document text
    • http://creditreportus.info/82129203875s1a67.pdfIn PDF document text
    • http://lenuvivureropi.scienceontheweb.net/lizitiropamakate.pdfIn PDF document text
    • http://dosaxixapaxa.medianewsonline.com/constitucin_poltica_de_mxico_artculo_115.pdfIn PDF document text
    • http://bilkan.fun/82117610359uiaz1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pujumek.myartsonline.com/fifty_shades_of_grey_netflix_usa.pdfIn PDF document text
    • https://s3.amazonaws.com/jeponowon/grinding_wheel_manufacturing_process.pdfIn PDF document text
    • https://s3.amazonaws.com/xukirizugukugi/37625269331.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_off0000d14c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD14C 2888 bytes
SHA-256: 78885e247b1e7efa683895f67bcb90bf022b72a1a9e3ebb6f11a578be93ecb94
font_01_sfnt_off0000db90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB90 5460 bytes
SHA-256: 0888904276527443f3865846a4e1f1afc1ac948a43210a60c170663421fc2f03
font_02_sfnt_off0000ee3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE3E 12000 bytes
SHA-256: 59b1ef5eb0ce2267d69e43fe87a9c8280ffe1c5850cd1bbcedbdbb37378f9c52

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