Malicious PDF — malware analysis report

Static analysis result for SHA-256 188a914e0e7e5ba1…

MALICIOUS

PDF

75.2 KB Created: 2021-01-11 03:11:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: c472e9fb80e2efb7c18806e383d1d4b7 SHA-1: ce75f648ef30f037f4052289dc8de67fd9a3b814 SHA-256: 188a914e0e7e5ba16a73b994f55ace07da71917ec766ffb4853e0b19a44da7d1
154 Risk Score

Malware Insights

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

The file is identified as malicious by multiple heuristics and a machine learning classifier, specifically flagging a link to known malicious redirector infrastructure. The embedded URL `https://traffking.ru/123?utm_term=concilio+de+nicea+portugues` is the primary indicator of malicious intent, likely serving as a lure for phishing or malware delivery. No scripts were extracted, but the presence of a malicious redirector strongly suggests an attempt to compromise the user.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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/123?utm_term=concilio+de+nicea+portugues In PDF document text
    • https://wesoxiworikezux.weebly.com/uploads/1/3/1/3/131380467/ximura-lenamo-sajunuzodeju.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406208/normal_5fe79451059ee.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4463006/normal_5fe1882a3d800.pdfIn PDF document text
    • https://worijuxadije.weebly.com/uploads/1/3/4/8/134863955/tokesalo-motezaz.pdfIn PDF document text
    • https://site-1174180.mozfiles.com/files/1174180/zenifizetod.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445101/normal_5ff779c1669eb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481285/normal_5fcd89210928e.pdfIn PDF document text
    • https://namosupegu.weebly.com/uploads/1/3/4/3/134313644/vimowibelek_pokimikasu_dugisimupiwux.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/ritoma/sphax_texture_pack_tekkit_classic.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_off0000e827.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE827 5144 bytes
SHA-256: 60b49c329b23f2893494f8e5cd75abe1e623e7f740745f842297f950a6ee9bbb
font_01_sfnt_off0000f9b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9B1 11244 bytes
SHA-256: 52ad980596c06e56c9ddc344a898b172f315cae938305759b0e7f80e447da029

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