Malicious PDF — malware analysis report

Static analysis result for SHA-256 07d32a35f7d8f603…

MALICIOUS

PDF

85.8 KB Created: 2021-02-27 01:20:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 20c2177a615c0ec5dda8b10588e8a937 SHA-1: 98a4e5b05d8634cc80a176d9e3fd826a51afad42 SHA-256: 07d32a35f7d8f6032feec906920ccfbc40cb48c8d66a16947531af01a8cb09f9
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://leonvi.ru/123?utm_term=how+to+access+the+service+menu+on+samsung+tv PDF link annotation
    • http://tuworiki.22web.org/sotogijuf.pdfIn PDF document text
    • https://cdn.sqhk.co/nupegefozub/iajgjbn/15851209276.pdfIn PDF document text
    • http://jibifiva.22web.org/calculus_early_transcendentals_6th_edition_free.pdfIn PDF document text
    • https://mugojilakifev.weebly.com/uploads/1/3/4/5/134510671/budarasoxidivuketof.pdfIn PDF document text
    • https://cdn.sqhk.co/kifukuvitog/siejjW3/pozubebufuwasovugosiduze.pdfIn PDF document text
    • http://idealica-italiauficiale.website/fiwawupedib8bp1l.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4401703/normal_5fe59d23b90d9.pdfIn PDF document text
    • https://cdn.sqhk.co/jogibigeda/GijCaqi/55475852881.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/kukupunopedon/certification_template_servicenow.pdfIn PDF document text
    • https://s3.amazonaws.com/lokijuronig/14309817366.pdfIn PDF document text
    • http://nalumilejoburo.rf.gd/gipixudomadunot.pdfIn PDF document text
    • https://s3.amazonaws.com/dazemi/vubegibedise.pdfIn PDF document text
    • http://bunulewokiluko.epizy.com/17583580644.pdfIn PDF document text
    • https://s3.amazonaws.com/minaxigevani/bc_annual_report_extraprovincial_company.pdfIn PDF document text
    • https://s3.amazonaws.com/gujutavevive/aptoide_android_tablet.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011220.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11220 5292 bytes
SHA-256: 59a7de2d48d50ddeef1d6b5f1ba1bbbf25a9e51828d23abdd8d5ab16b74db78e
font_01_sfnt_off00012411.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12411 11152 bytes
SHA-256: 092481c2802857a9e506b74defe00ff96f19e3673ce21e0bc311ebdd787c000c

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