Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e1fbcd210e64e9e…

MALICIOUS

PDF

66.2 KB Created: 2020-11-24 16:51:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 8f3484a1ad04d3b2d1d01d5320bf2562 SHA-1: 030c61cb00f57822019c6601d8b2b38c4b12b774 SHA-256: 0e1fbcd210e64e9ea026f9e122141ff33fa485687e43bc041d7cb1abe848657c
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a large number of external links, many of which point to other PDF files, suggesting a link farm or redirection scheme. One of the primary external URIs, 'https://traffking.ru/strik?utm_term=voice+of+snow+white+2016', is flagged as suspicious and likely leads to a malicious site. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery.

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://traffking.ru/strik?utm_term=voice+of+snow+white+2016 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4413108/normal_5fa79731c8e5a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4492529/normal_5fad593023a70.pdfIn PDF document text
    • https://nudojafobedem.weebly.com/uploads/1/3/1/3/131379550/5665029.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413017/normal_5fae40479aed2.pdfIn PDF document text
    • https://junafoxotoroj.weebly.com/uploads/1/3/0/7/130738975/366582.pdfIn PDF document text
    • https://minufufigazibur.weebly.com/uploads/1/3/4/5/134528603/5286137.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/d5e1f476-e5d3-42b7-aad1-e5dba33fdfaa/neuritis_intercostal.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ae27203a-e89b-4748-ae99-d195eb5e2042/spyderco_slysz_bowie.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a76faebc-0c58-46b7-a73f-70b4fb58cde5/54614044030.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/53b43b0a-708a-402a-a38f-0cfc067412ce/tizulolugufukaxijulefome.pdfIn PDF document text
    • https://s3.amazonaws.com/suzixegazunow/denton_isd_school_calendar_2020_-_2021.pdfIn PDF document text
    • https://s3.amazonaws.com/pegek/define_economizing_problem.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_off0000c5c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC5C7 5168 bytes
SHA-256: a7d2ee69ba9b2a7e5a7c562d6b0a14b6a39211e11cd8e4bef6451861e2fd853f
font_01_sfnt_off0000d788.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD788 10884 bytes
SHA-256: db1af8200fd9e921b17d740707567f3d2e238b426cfa43f5e2eb56ac8b641372

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