Malicious PDF — malware analysis report

Static analysis result for SHA-256 96792bdf5b6aef12…

MALICIOUS

PDF

78.9 KB Created: 2021-03-19 14:18:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 7ef3fd5d24775939a90f1a52be2e364c SHA-1: deec38ea42df0930829388a2ac9e08a2f0e1ec8c SHA-256: 96792bdf5b6aef123ac45d886af5a5fb7b4a3ba77ae93ddd1cc518b517445e5e
186 Risk Score

Malware Insights

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

This PDF document contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing operation. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, appears to be related to 'video crop apk for pc', likely a lure to direct users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://botokaw.ru/wix?keyword=video+crop+apk+for+pc PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4411691/normal_5ff5b5f84ce13.pdfIn PDF document text
    • https://pazibeze.weebly.com/uploads/1/3/1/6/131636707/1443748.pdfIn PDF document text
    • https://jovinafunen.weebly.com/uploads/1/3/2/6/132695325/1259856.pdfIn PDF document text
    • http://pubolovuwete.iblogger.org/savij.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495050/normal_60432f6037bce.pdfIn PDF document text
    • https://vobudogekatobef.weebly.com/uploads/1/3/0/8/130874620/wexuzevujojid.pdfIn PDF document text
    • https://zexexidiwe.weebly.com/uploads/1/3/5/3/135330220/porebovuragara.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421767/normal_5fcb5b689b83a.pdfIn PDF document text
    • https://wuxinaruniluxod.weebly.com/uploads/1/3/4/8/134882591/runiluvabiga.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382407/normal_60451423e6b45.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490116/normal_5ff085af2bd07.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448985/normal_602a1857a7bb6.pdfIn PDF document text
    • http://xabibumat.iblogger.org/how_do_you_know_if_your_dachshund_is_a_mini.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471235/normal_602545274049d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407070/normal_6001fef07d627.pdfIn PDF document text
    • https://gewewipuno.weebly.com/uploads/1/3/0/7/130775766/padasi-beruza-bamipe.pdfIn PDF document text
    • https://fifesijewawo.weebly.com/uploads/1/3/1/4/131412558/jimedipeke.pdfIn PDF document text
    • https://xigakoter.weebly.com/uploads/1/3/1/3/131379919/943c41.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://9e9203d9-9f5b-42f2-a849-05e42d741f90.filesusr.com/ugd/3527d5_5da51de7723f4c45851af5f0965919a2.pdf?index=trueIn PDF document text
    • https://d03ec42c-8b93-48d3-a61e-9aee396c0db4.filesusr.com/ugd/1e557c_6a2572f44d264e9a8574b91bde07ce11.pdf?index=trueIn PDF document text
    • http://marilineme.epizy.com/pool_pilot_digital_nano_manual.pdfIn PDF document text
    • http://mabobasator.epizy.com/caricatura_politica.pdfIn PDF document text
    • https://e8677ced-6330-435e-8237-200fb10408a4.filesusr.com/ugd/a4c1fa_3580e4a0cd664f7690399815bc94ed22.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_off0000f757.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF757 4968 bytes
SHA-256: 1878e4852c4fadb9b52f754ce2726ff4285dbd0dafb10987b03925516943c3f0
font_01_sfnt_off00010859.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10859 11136 bytes
SHA-256: aa9b2bd3696f07a347ab9e4e5cf70238f96d8fd4318a827eebd27cba85490ed0