Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee99b3ff9c8a37db…

MALICIOUS

PDF

83.8 KB Created: 2021-02-28 11:11:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: ec6551ec20249e041a5bdab036eaef50 SHA-1: cb4cfbb7a77a40343b7f68e415284af0d5dc5212 SHA-256: ee99b3ff9c8a37db6add927c3ca45030777f156539e8576bf1220449b5d31b4b
186 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and an ML classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The document contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing campaign. While no scripts were explicitly extracted, the presence of external URIs and the nature of the heuristics indicate a malicious intent to redirect users to potentially harmful content.

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://vilenefex.ru/wix?keyword=jacksonville+fl+county+map PDF link annotation
    • https://balolenitazir.weebly.com/uploads/1/3/1/0/131071159/13f603281967f.pdfIn PDF document text
    • https://kitaterikobojim.weebly.com/uploads/1/3/0/9/130969176/zuluvoxilek.pdfIn PDF document text
    • https://luludosob.weebly.com/uploads/1/3/4/7/134703274/4354118.pdfIn PDF document text
    • https://dijibelusubif.weebly.com/uploads/1/3/4/8/134871127/levufexupi.pdfIn PDF document text
    • https://merelakududeva.weebly.com/uploads/1/3/2/3/132303156/vopagimifezataz.pdfIn PDF document text
    • https://pekupepavipojev.weebly.com/uploads/1/3/1/8/131872203/3928215.pdfIn PDF document text
    • https://toredakiwireg.weebly.com/uploads/1/3/0/7/130739366/a13fa4ed778.pdfIn PDF document text
    • http://lexanizisujufum.66ghz.com/42836535762.pdfIn PDF document text
    • https://mumovukejepi.weebly.com/uploads/1/3/1/4/131483147/fewituwaxad.pdfIn PDF document text
    • https://jodalutuz.weebly.com/uploads/1/3/4/4/134444421/20f55190a8d6d99.pdfIn PDF document text
    • https://nodararikerat.weebly.com/uploads/1/3/4/8/134885074/dc66d.pdfIn PDF document text
    • https://wubuzafovotul.weebly.com/uploads/1/3/0/8/130814439/jedopububiliku_mijobawodimun_gelitezaruje_rewudu.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://dijazulebok.epizy.com/41169082530.pdfIn PDF document text
    • http://vujapaporetakik.epizy.com/wanekalomipi.pdfIn PDF document text
    • http://vikuvexujanevat.epizy.com/hesta_claiming_a_superannuation_death_benefit_guide.pdfIn PDF document text
    • http://fonimegalidoxu.epizy.com/amaravathi_tamil_hd_full_movie.pdfIn PDF document text
    • http://fataragoreb.myartsonline.com/types_of_chemical_bonds_worksheet_answer_key.pdfIn PDF document text
    • http://losalevova.epizy.com/86236242545.pdfIn PDF document text
    • http://kivozusemu.atwebpages.com/murray_lawn_tractor_for_sale.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_off0000fe8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE8C 5160 bytes
SHA-256: 6e64f4120d363f10cb1fecc2a8fd0aa91123897a11bb8ac9e439d5244e3162ac
font_01_sfnt_off0001101d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1101D 10360 bytes
SHA-256: e0b62593eef5d5e989d808269702b2ff6e1a7e93a2654b1a79b50866fd1f3182
font_02_sfnt_off0001339c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1339C 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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