Malicious PDF — malware analysis report

Static analysis result for SHA-256 26062bed248fceed…

MALICIOUS

PDF

84.2 KB Created: 2021-01-02 06:16:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: bb52b288a1e1a49b8a794dd4666087e8 SHA-1: 0e013660bc49bb59284775e6f739861f58ebbd67 SHA-256: 26062bed248fceedb9b6676891f4605ead78c4f3768de521128f159995714270
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. It contains a large number of external links, many pointing to disposable hosting, suggesting a link farm or SEO manipulation tactic. The embedded content, though heavily obfuscated, appears to be related to Java programming, likely a lure to disguise the malicious intent of redirecting users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://trafficel.ru/123?utm_term=arraylist+to+array+java+7 PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4452377/normal_5fdea38468b65.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418001/normal_5fbec1d069bb8.pdfIn PDF document text
    • https://vaxejoxumede.weebly.com/uploads/1/3/5/3/135346770/ziden.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388833/normal_5f9eb70c37ecb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4386073/normal_5fe1cc41d046a.pdfIn PDF document text
    • https://tadeganerusoza.weebly.com/uploads/1/3/1/4/131438541/2550047.pdfIn PDF document text
    • https://paludiwebi.weebly.com/uploads/1/3/4/0/134012690/241689fdf07e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425501/normal_5fb91d49ccee2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393348/normal_5fef7dc1a9c98.pdfIn PDF document text
    • https://gapotijaj.weebly.com/uploads/1/3/1/3/131383657/8186120.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482880/normal_5fa72e2c706cf.pdfIn PDF document text
    • https://lezuzanufebaj.weebly.com/uploads/1/3/4/8/134873312/xadigux.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
    • https://uploads.strikinglycdn.com/files/2f3bc9ca-023e-4c34-b66f-96349f937946/razinobodikajoze.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d8549118-9839-4525-ae75-3a599f7b01c5/77904560007.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ff5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF5A 4552 bytes
SHA-256: 011499b7a8a467dd109efd3be69eadf790daf59d519ea86b23e011abc7489698
font_01_sfnt_off00010ee8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EE8 11372 bytes
SHA-256: ebe398a5560f9976089f32f3cf6d32c05d785960cfe34fe4c1974a4aa9d43705
font_02_sfnt_off000135f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x135F2 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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