Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6748bf2ea0cf005…

MALICIOUS

PDF

64.5 KB Created: 2020-12-02 01:59:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 31e91dd1bc2c9f32ce9c696772736457 SHA-1: 1ff7d9cf3efdaa90743f7305bcc5b78e6d4b6da6 SHA-256: c6748bf2ea0cf0052329f98953b757f98e896c89e21964b6586fed9c9a934599
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://trafffe.ru/123?utm_term=regional+center+of+orange+county+service+coordinators PDF link annotation
    • https://xojisige.weebly.com/uploads/1/3/1/6/131637148/gimepure.pdfIn PDF document text
    • https://dasujodiket.weebly.com/uploads/1/3/4/4/134481559/9024911.pdfIn PDF document text
    • https://rinedasufuketon.weebly.com/uploads/1/3/4/3/134340565/130b59d385af1c.pdfIn PDF document text
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/vigirupiruwovilav.pdfIn PDF document text
    • https://fagisidide.weebly.com/uploads/1/3/2/6/132682833/7194830.pdfIn PDF document text
    • https://femulonatif.weebly.com/uploads/1/3/4/5/134501650/e1142df6a7245e.pdfIn PDF document text
    • https://tusidotug.weebly.com/uploads/1/3/4/4/134482214/2634617.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/6a5ad500-89ea-4d53-8522-84fc253e7a1a/vakimivebosemuvutudef.pdfIn PDF document text
    • https://s3.amazonaws.com/jotizifime/50_tons_de_liberdade_livro_completo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/19ed6a9b-3397-428d-8b18-f84761377649/77483008651.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc4e9c47d0c8f249d5a9be7/t/5fc62a923570fb44d1d4f78a/1606822546728/hardest_game_ever_unblocked_66.pdfIn PDF document text
    • https://s3.amazonaws.com/lokijuronig/anastrozole_package_insert.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4c340104-2ffc-4b83-81aa-13d30daefadf/21949969449.pdfIn PDF document text
    • https://s3.amazonaws.com/jiguwuzobozobaz/wutuvejix.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc555ab88c99b6d37c4c7cb/t/5fc67cde3485235c86a7c47c/1606843615273/jakipidofuwagazuxomebi.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000beda.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBEDA 5360 bytes
SHA-256: b73657d31d94980fbaa55a0378bdb6a0d1e70d005e0e038d2595d632364388cc
font_01_sfnt_off0000d13b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD13B 10524 bytes
SHA-256: ed8f051ffb9bbf68cbd8a05d98fcd52b3cd4dbc2a249c411d21d71658a44ec56

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