Malicious PDF — malware analysis report

Static analysis result for SHA-256 5568e95bb79f0fdd…

MALICIOUS

PDF

84.4 KB Created: 2021-01-07 20:39:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 4965c597d9cc0b7d1f228cd8507a1c2a SHA-1: 90e638a85ce2681ee7d78cb6b88c817291bf034c SHA-256: 5568e95bb79f0fdd43ebabfe0096dda82172f7cc480e4eb03ed682eaff03bf4e
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, indicating malicious intent. It contains numerous external links, with one prominent URL pointing to 'traffset.ru', suggesting a phishing or redirection attempt. The presence of embedded links and the overall structure point towards a malicious document designed to lead users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • 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://traffset.ru/aws?utm_term=telugu+language+films+dubbed+in+tamil PDF link annotation
    • https://wonulabanasilod.weebly.com/uploads/1/3/1/4/131482851/d51315f.pdfIn PDF document text
    • https://cdn.sqhk.co/bojojiweg/TMtiehb/cartoon_wallpapers_cute.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484399/normal_5fb8f0d2737c1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388162/normal_5fb9551207454.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385213/normal_5fa9ed1e9fa1f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4456143/normal_5ff6616b051a6.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/bexolamabad/99965814051.pdfIn PDF document text
    • https://s3.amazonaws.com/nolarifaforuxop/kusurisosasibed.pdfIn PDF document text
    • https://s3.amazonaws.com/sikuva/87827263858.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f9e4b6ec-1aa0-49a1-9d97-9501b3cfc875/lilepevomibejasasuwo.pdfIn PDF document text
    • https://s3.amazonaws.com/jupudizadid/engineering_guide_vanilla_1-_300.pdfIn PDF document text
    • https://s3.amazonaws.com/regovadeje/indian_giver_quote_origin.pdfIn PDF document text
    • https://s3.amazonaws.com/gazijewevan/gedegenonozibogogibupi.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000118da.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x118DA 24968 bytes
SHA-256: b743b6f7293870de5e34dfc74d6a4b6e18599009e7e1807a4d6594bf274c43be
font_00_sfnt_off0000e29e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE29E 5220 bytes
SHA-256: 89bd044a55eacfe9218cf8e863198497e4e398340babb2302857158985fd6551
font_01_sfnt_off0000f456.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF456 10676 bytes
SHA-256: 302f85f12f58893f27ad27372e0446141bcc5a272977ca4fa5a3b720eb2809dd

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