Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c6b6390bdb8c278…

MALICIOUS

PDF

62.2 KB Created: 2021-02-21 13:41:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 4dddcbdd34b33b90c72e9b4eedf9e5ea SHA-1: 236930d794d17f42c08b548f221e98eface94c4c SHA-256: 0c6b6390bdb8c278c17d0830acf91e7427739d4ca66cbd0b41a15c61e976b876
184 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was identified as malicious by multiple heuristics and a machine learning classifier, specifically flagged as a redirector link to known malicious infrastructure. The embedded links, such as 'https://crophysi.ru/strik?utm_term=1999+honda+shadow+1100+aftermarket+parts', are designed to lead users to potentially harmful websites. The document's structure and numerous links suggest a phishing or malware distribution attempt, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://crophysi.ru/strik?utm_term=1999+honda+shadow+1100+aftermarket+parts In PDF document text
    • https://cdn-cms.f-static.net/uploads/4420906/normal_5fd1d0d423daa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416502/normal_5fcf4af30e6a9.pdfIn PDF document text
    • https://cdn.sqhk.co/wotezowedo/Cje0Bze/dusonaxomipezorekid.pdfIn PDF document text
    • http://kosiwixiwumizu.iblogger.org/33345902816.pdfIn PDF document text
    • https://nubeboganiroj.weebly.com/uploads/1/3/1/3/131384383/muvama-mukalituberazuz-wifememekekon-nufoxos.pdfIn PDF document text
    • https://cdn.sqhk.co/fojilude/fjjhjcJ/zililajovazav.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4443337/normal_60015089be389.pdfIn PDF document text
    • https://wobufijurix.weebly.com/uploads/1/3/1/6/131607063/1476499.pdfIn PDF document text
    • http://xadixul.66ghz.com/sustainability_reporting_software.pdfIn PDF document text
    • http://gadibigari.22web.org/washington_dept_of_licensing_report_of_sale.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tafoboverel.epizy.com/rulunise.pdfIn PDF document text
    • https://s3.amazonaws.com/zubuwujoxom/91349304676.pdfIn PDF document text
    • https://s3.amazonaws.com/takebemanijewok/tojetos.pdfIn PDF document text
    • https://s3.amazonaws.com/wemazun/8993013248.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b5dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB5DC 5660 bytes
SHA-256: 3f0b4048406b8b923f0227bcfa8e8a042338fb26e98caba471f8205f4b8d78d5
font_01_sfnt_off0000c901.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC901 10396 bytes
SHA-256: 7f22796152336e78de85f12d36d4cc1a89b8104367b885a965d1ce344467c65c

Open this report in the interactive analyzer, or submit your own file for analysis.