Malicious PDF — malware analysis report

Static analysis result for SHA-256 d447995dd9ce79d8…

MALICIOUS

PDF

71.0 KB Created: 2021-01-08 10:40:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 63e5db4a284daff92e54780cc9f22f9c SHA-1: 1e9713e03bad20ca79df2507aa2fde0d45785ed4 SHA-256: d447995dd9ce79d8a8b65e0cdba54ca3e6f7fa7ac49ae5d6b9b3af6fce6c67ee
156 Risk Score

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, as malicious. It contains a large number of external links, with one heuristic specifically identifying it as a 'PDF_SEO_LINK_FARM'. The primary external URL observed is 'https://traffset.ru/123?utm_term=legally+blonde+the+musical+jr+cast+list', and another significant link points to 'https://cdn.sqhk.co/lusimalifa/gcijnkn/dafobani.pdf'. These links suggest the document's purpose is to redirect users to potentially harmful or deceptive content, possibly as part of a phishing or scam campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://traffset.ru/123?utm_term=legally+blonde+the+musical+jr+cast+list PDF link annotation
    • https://cdn.sqhk.co/lusimalifa/gcijnkn/dafobani.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480170/normal_5fbecc46f0933.pdfIn PDF document text
    • https://jifalutisapore.weebly.com/uploads/1/3/4/7/134772579/7969243.pdfIn PDF document text
    • https://bibeliki.weebly.com/uploads/1/3/0/7/130738572/120c0bf62c84.pdfIn PDF document text
    • https://cdn.sqhk.co/minutakumu/CZAYehg/95361953143.pdfIn PDF document text
    • https://xogexemufak.weebly.com/uploads/1/3/1/4/131437987/6112377.pdfIn PDF document text
    • https://cdn.sqhk.co/wixefawoz/iagcKQz/baixar_zombie_tsunami_apkpure.pdfIn PDF document text
    • https://polabobaxadujo.weebly.com/uploads/1/3/4/7/134775235/mijesorebetave_kemomoj.pdfIn PDF document text
    • https://cdn.sqhk.co/wuvexudid/f4yMWjg/29279675695.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/henghuili-files2/4459208019.pdfIn PDF document text
    • https://s3.amazonaws.com/juvuraguvutoxif/today_news_paper_in_english_the_times_of_india.pdfIn PDF document text
    • https://s3.amazonaws.com/semuxemakaw/reception_english_worksheets_free_printable_uk.pdfIn PDF document text
    • https://s3.amazonaws.com/vonutavekip/tipibes.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_off0000d793.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD793 5612 bytes
SHA-256: 3c1c31389d08a1e25476e6a6dae538795dba730829ac81a3c320c93c24f7afab
font_01_sfnt_off0000ea8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA8B 10820 bytes
SHA-256: f43521113e0298989f0b2522a54b0b3904afd468cfd1f4a0112e50ddd40613d9

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