Malicious PDF — malware analysis report

Static analysis result for SHA-256 063a8bb15bdd9bfe…

MALICIOUS

PDF

66.9 KB Created: 2021-01-11 01:25:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 9c72b5c940d20e65ff2ce7f8d2eb7824 SHA-1: 7519cf0794927ccbdcf4227b6b6448dc299f1ea6 SHA-256: 063a8bb15bdd9bfed945d8104f07d842daa825260841436152aaae0c53ef55fe
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to PDF files, suggesting a link farm for SEO manipulation or malware distribution. The presence of a malicious ML classification and ClamAV detection further supports its malicious nature. The embedded URL 'https://traffnew.ru/123?utm_term=just+one+call+away+chords' is a primary indicator of the intended malicious redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://traffnew.ru/123?utm_term=just+one+call+away+chords PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4461207/normal_5fd8fd1beee59.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425229/normal_5ffb8c36dffee.pdfIn PDF document text
    • https://tuvunexe.weebly.com/uploads/1/3/4/3/134327091/ceb4d5d5cd2e157.pdfIn PDF document text
    • https://zukodefikarux.weebly.com/uploads/1/3/4/4/134498552/d1b892e48.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426062/normal_5fbb20c359b07.pdfIn PDF document text
    • https://tubababekegoso.weebly.com/uploads/1/3/4/8/134880125/rigapu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392661/normal_5fbf981d52863.pdfIn PDF document text
    • https://sadutixonigonu.weebly.com/uploads/1/3/1/4/131412491/jixajefodore.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385230/normal_5fb2e494c8835.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484358/normal_5fdf0fa4a0197.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/xoxaneral/48537198434.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b47d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB47D 5044 bytes
SHA-256: 31a218856430080191ad417a012966f2aae301ca852fd2613054ecf9b5c43cb6
font_01_sfnt_off0000c5a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC5A2 1800 bytes
SHA-256: a36eee06fef6ce219692c4ec918276ac99413e4fd1e3666e4031624f9289d620
font_02_sfnt_off0000ce2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE2F 10128 bytes
SHA-256: d945c1d24674a7d3564877e29b9da950bbf3c653504db0f005604cd25b5fc763
font_03_sfnt_off0000f0ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0ED 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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