Malicious PDF — malware analysis report

Static analysis result for SHA-256 8363aedd7f3b3c07…

MALICIOUS

PDF

72.3 KB Created: 2021-02-26 16:32:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: b2edd840dfab75ad3ed196fc30cfefa0 SHA-1: 9dd3e01b87cd2905af57f3727d5c710e2680c1e6 SHA-256: 8363aedd7f3b3c070b780f5f43bbbb1f9c6e406e287775aab407472abd332b37
156 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. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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.
  • 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://jumiwimov.ru/wix?keyword=palm+beach+county+health+care+district+provider+directory PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4414498/normal_6000b5aa8b403.pdfIn PDF document text
    • http://datingsexchat.site/devukemupibigetupoojznc.pdfIn PDF document text
    • http://iuts.space/47651453103qyxfh.pdfIn PDF document text
    • http://coloradocustomelectric.com/5400313378135840.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495558/normal_6004c284198be.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4422150/normal_6008eadd1b3f3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367927/normal_6015f31d2db9c.pdfIn PDF document text
    • http://babysampler.com/adobe_3d_export_to_step_freeware4xy6h.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4386849/normal_5fddc0dba5db2.pdfIn PDF document text
    • https://tunawirivam.weebly.com/uploads/1/3/1/4/131437064/vomilere_gozeludesutato.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410695/normal_5fc7c2acb965e.pdfIn PDF document text
    • http://ketousa.site/pudukaw6j38.pdfIn PDF document text
    • http://rafale.store/mifekeravobetiketusokuk614gn.pdfIn PDF document text
    • https://xixilizuxuwogag.weebly.com/uploads/1/3/4/8/134879277/a297c529358c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/likerajatob/7396588454.pdfIn PDF document text
    • https://s3.amazonaws.com/vibuvomomuv/twitter_for_blackberry_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/nitizobuv/convert_to_dwg_autocad_2009.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 7

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_off0000dcf6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCF6 5616 bytes
SHA-256: 1d42c05728ae1cc8e48721084bced6e75cfb7ab033accdb78054bd103dba0e98
font_01_sfnt_off0000efe5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFE5 10524 bytes
SHA-256: 9b33ee6025bbbf5d2c112cb2d44a6d2d1f6f75587d1923bc4c6598b3a632bb4e

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