Malicious PDF — malware analysis report

Static analysis result for SHA-256 c1b1664af07a3bba…

MALICIOUS

PDF

78.9 KB Created: 2021-02-28 18:41:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: c3a97e1627207bd60d57198a9bebdb82 SHA-1: 6ea8d6fb4a9b9b98a2941d977a645e3315a0dbfa SHA-256: c1b1664af07a3bbac699410930208dbd5c0d9437eb27c83f542f4bc56c3f3e23
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to distribute malicious content. The primary URL, 'https://baarspo.ru/strik?utm_term=kalki+purana+in+telugu+pdf', is presented as a search result, indicating a lure to a malicious site. While no scripts were explicitly extracted, the PDF structure and numerous external links strongly suggest an attempt to redirect users to potentially harmful content, aligning with phishing or malware distribution tactics.

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://baarspo.ru/strik?utm_term=kalki+purana+in+telugu+pdf PDF link annotation
    • https://wijugola.weebly.com/uploads/1/3/2/3/132303023/rilepoto.pdfIn PDF document text
    • https://pugewolusaw.weebly.com/uploads/1/3/1/4/131453132/7117326.pdfIn PDF document text
    • https://gobodukigibab.weebly.com/uploads/1/3/1/8/131856162/6d1b22c3be52.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388835/normal_5fc81965cdbff.pdfIn PDF document text
    • http://getporte.xyz/963642408616fd3x.pdfIn PDF document text
    • http://goladelexugezi.sportsontheweb.net/xawibaso.pdfIn PDF document text
    • http://lezigovedavide.getenjoyment.net/boss_br_900cd_review.pdfIn PDF document text
    • https://kutumamam.weebly.com/uploads/1/3/4/8/134893394/kilivasef.pdfIn PDF document text
    • https://gadikidaju.weebly.com/uploads/1/3/1/3/131379663/sevobitexe.pdfIn PDF document text
    • https://sawatulaboror.weebly.com/uploads/1/3/2/7/132710797/zozij-felita-kulijagisozopis.pdfIn PDF document text
    • https://vizokajobekaxa.weebly.com/uploads/1/3/0/9/130969885/dipapolelilo-nugereteb-zenadinil-sureziwefibimuv.pdfIn PDF document text
    • https://vurikiwuguwek.weebly.com/uploads/1/3/1/4/131408439/2e6a4428a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • http://nixomirorubu.myartsonline.com/leribufutoxenasenexuniz.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_off0000ea36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA36 5064 bytes
SHA-256: a28c4ecaa8ae76ec8287850a9d71fb89318f454b9f096996a1a4ba5fe4077613
font_01_sfnt_off0000fb84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB84 12360 bytes
SHA-256: 8455854dcfbf362567d587199851475cfe25c8f09b6a27cc5629d2403f3d7fa0
font_02_sfnt_off000121e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121E7 3152 bytes
SHA-256: 8f846e631cd2c2045479b700499fb87d4f795f218b775f8c6ef7c3aae9181e39

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