Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f7be0d62ff77a01…

MALICIOUS

PDF

74.9 KB Created: 2021-02-11 20:32:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 0dc6536dec8b1a4956889f8962bbba41 SHA-1: 5739a046ac7a09bb0c3f7991a3706ba469527f39 SHA-256: 7f7be0d62ff77a0126609a66a6c37ee3e2801ef5a0296a31b828054b31f8f4b6
126 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs, many of which point to disposable domains and are likely part of a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, specifically phishing. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with phishing lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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.
  • 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/wb?keyword=atal%20pension%20yojana%20pdf%20sbi PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4476432/normal_6023b986f13bb.pdfIn PDF document text
    • https://cdn.sqhk.co/mowasikuso/Fldgdie/mivopodezamobupeguwip.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375207/normal_5fe0b45571fb9.pdfIn PDF document text
    • http://bit7.top/new_odia_movie_song_freeryu4s.pdfIn PDF document text
    • http://logvoz.ru/58909078230w7l4w.pdfIn PDF document text
    • http://tiktoktop.design/xosonedapaxivi29zw5.pdfIn PDF document text
    • http://cmb-eco.com/cautivante_libro_descargarhvnlh.pdfIn PDF document text
    • http://marinarus.space/rivorubebizxufjf.pdfIn PDF document text
    • https://cdn.sqhk.co/kinibemazoz/ij97ja6/mobile_grandfather_clock_repair_near_me.pdfIn PDF document text
    • https://cdn.sqhk.co/wifavizen/fhbgh4p/key_leadership_skills_and_abilities.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421611/normal_5fd176fc867d8.pdfIn PDF document text
    • http://cccckkkkkdd.space/jugomisubegonomagenodosh5.pdfIn PDF document text
    • http://hdvideo.design/gepofudunuzetozawxcww.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4457586/normal_5fe4416c93168.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/wovisak/zawilikagisi.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_off0000e801.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE801 5244 bytes
SHA-256: 7eb80ea90e4a90938b930ad8c8e7e63ac9a0e3b40a5478b025306a44e6d8d638
font_01_sfnt_off0000f9f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9F8 10812 bytes
SHA-256: c29616148eef3026ad74c1b01ff04b1adc5a90a41c45a7638a2a7266abe6f2d2

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