Malicious PDF — malware analysis report

Static analysis result for SHA-256 b4629ea39a2ba4b5…

MALICIOUS

PDF

84.7 KB Created: 2021-05-09 11:19:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: fc1b44f623600561d84647cb4156e681 SHA-1: de957d87f98686161d4598f42ee45d2d7bb3ad71 SHA-256: b4629ea39a2ba4b583f4551c54a16fab3cdf1cec3643820d5d7e093cabc92d37
194 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://golowaki.ru/strik?utm_term=download+apk+game+playboy+the+mansion PDF link annotation
    • https://rixutabenenik.weebly.com/uploads/1/3/4/4/134498467/lonalow_zekabigob_gemigojuveko.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413346/normal_6037f14631fa6.pdfIn PDF document text
    • https://cdn.sqhk.co/vozumolajaw/TDH2zYR/rirofozowud.pdfIn PDF document text
    • https://mibuvenatevuwo.weebly.com/uploads/1/3/4/6/134607329/fotewel_bebupagaseluwo_wubukapuradeko.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387408/normal_600552f33ac75.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490263/normal_5fe826600a644.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403937/normal_60610916d55df.pdfIn PDF document text
    • https://cdn.sqhk.co/wesuwajil/ULXhhie/79995370153.pdfIn PDF document text
    • http://sorewoforami.22web.org/5062950630.pdfIn PDF document text
    • https://belujewirozem.weebly.com/uploads/1/3/2/6/132681559/mepinedinunireweko.pdfIn PDF document text
    • https://wopuvonu.weebly.com/uploads/1/3/1/3/131384791/3764328.pdfIn PDF document text
    • http://zuvexuz.iblogger.org/gemotoka.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://rebukupomapet.rf.gd/venego.pdfIn PDF document text
    • https://da5bec28-7969-4117-8ffb-5069fce5e80c.filesusr.com/ugd/31593d_a73e9fef96b340948875c106e4c1e664.pdf?index=trueIn PDF document text
    • http://vuremekewema.rf.gd/32442749635.pdfIn PDF document text
    • https://s3.amazonaws.com/webipejonavuv/getexojasos.pdfIn PDF document text
    • http://demunoj.epizy.com/95596223454.pdfIn PDF document text
    • https://s3.amazonaws.com/potofaw/86657658344.pdfIn PDF document text
    • https://f110cc6a-49d6-427c-9ab6-a3a4d323b004.filesusr.com/ugd/9e53d4_4ada9ff3624e45fe8797bde9b0404945.pdf?index=trueIn PDF document text
    • https://1e16f6d7-285b-4488-bf07-d3e24ac90e20.filesusr.com/ugd/417718_8310dfed153b41e08fc478da272a2523.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_off00010b49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B49 5676 bytes
SHA-256: 4782d9e4b896ae96469cc6eeb0b9254c9cfffd47cc3c709dcaa0870ba2159d35
font_01_sfnt_off00011e92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E92 11480 bytes
SHA-256: 2a2c2a4980c500202176c002244c75fdf630d647e7ac680a50af3e2b6003ed7a

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