Malicious PDF — malware analysis report

Static analysis result for SHA-256 3580ed7cd118cc63…

MALICIOUS

PDF

66.9 KB Created: 2021-01-29 21:58:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 0587675bbb520de2cb7fd69fc0195723 SHA-1: 07f1a0a11b2e92189b11a94a07fc3c3134b1103e SHA-256: 3580ed7cd118cc634be8e5d858a18330fcb05005744d951d809cf58b6d285e40
156 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or malicious content delivery attempt. It contains numerous external links, with one prominent link pointing to a URL that appears to be part of a link farm designed to attract traffic. While no scripts were explicitly extracted, the PDF structure and the presence of external links suggest an attempt to redirect users to potentially harmful websites, possibly for further exploitation or phishing.

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://seumenha.ru/wb?keyword=black%20boy%20haircuts%20with%20long%20hair%20on%20top PDF link annotation
    • https://bufibetotireguk.weebly.com/uploads/1/3/0/7/130739935/vimuwuburuwaba.pdfIn PDF document text
    • https://pazopoxe.weebly.com/uploads/1/3/5/2/135293382/didese.pdfIn PDF document text
    • https://cdn.sqhk.co/kezavilageg/9CjcTU4/1301008914.pdfIn PDF document text
    • https://cdn.sqhk.co/mujowofapubi/heM3gcJ/cnbc_make_it_instagram.pdfIn PDF document text
    • https://vepakuwaderim.weebly.com/uploads/1/3/4/6/134699920/gusabitefo.pdfIn PDF document text
    • https://dejutuzalusabi.weebly.com/uploads/1/3/4/8/134869317/9991069.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/pazatuv/nepoper.pdfIn PDF document text
    • https://s3.amazonaws.com/kabisebax/astm_a106_gr_b_specification.pdfIn PDF document text
    • https://s3.amazonaws.com/wofaxil/24845115400.pdfIn PDF document text
    • https://s3.amazonaws.com/zasepo/kawinagapaxobi.pdfIn PDF document text
    • https://s3.amazonaws.com/fosagobomap/natavoxawijaliz.pdfIn PDF document text
    • https://s3.amazonaws.com/pasawe/miwagarejakanivabibomo.pdfIn PDF document text
    • https://s3.amazonaws.com/wulotugadag/rise_of_nations_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/dadupawo/satuzikifidenuwe.pdfIn PDF document text
    • https://s3.amazonaws.com/xisakazelelinim/tusixade.pdfIn PDF document text
    • https://s3.amazonaws.com/jevelel/95188376010.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_off0000c986.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC986 5644 bytes
SHA-256: 8ed55437228df99a4bb329f9db046dfb61c3708608db65d1dd9c24ca0f0e4594
font_01_sfnt_off0000dccd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCCD 9956 bytes
SHA-256: 9ed752f049e5761012129d4853d712fc26e5092213e1f936cf360d7d8d6cc066

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