Malicious PDF — malware analysis report

Static analysis result for SHA-256 3b996e3c0cad0637…

MALICIOUS

PDF

79.1 KB Created: 2021-01-11 11:35:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 7c78e4ac591c216bcc5d2e0487dd5515 SHA-1: 73d958a9232d506065388fd3347f7b663d79eb38 SHA-256: 3b996e3c0cad0637869ed44f00e16f89847c285ded90ddfbb73793a58fce55a9
214 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, including a known malicious redirector and a large link farm, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The document body, though heavily obfuscated, appears to be a lure related to 'Alan walker faded piano sheet free', aiming to trick users into clicking malicious links.

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
  • 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.
  • 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.
  • 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://ggtraff.ru/aws?utm_term=alan+walker+faded+piano+sheet+free In PDF document text
    • https://cdn.sqhk.co/fatobaliv/dhgGiiU/minecraft_one_block_skyblock_ip_address.pdfIn PDF document text
    • https://cdn.sqhk.co/nalawanuxa/zgjijMR/color_controller_e-_22c.pdfIn PDF document text
    • https://cdn.sqhk.co/donaxewon/jbgeTES/the_fitness_freedom_flow_oudenaarde.pdfIn PDF document text
    • https://cdn.sqhk.co/nenuguvan/hjgjG0v/70489359302.pdfIn PDF document text
    • https://cdn.sqhk.co/sexuzoropa/Obihhtd/dragon_age_elf_clan_names.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4474727/normal_5fdeefba848fc.pdfIn PDF document text
    • https://cdn.sqhk.co/tukawezezo/b1wchhC/mozopelozot.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4389792/normal_5fdfc6c520727.pdfIn PDF document text
    • https://bileravufal.weebly.com/uploads/1/3/4/7/134749654/rolezafur.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383688/normal_5fdc32f2a4dfa.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/bezegoluzose/ripawiruziketewopaloto.pdfIn PDF document text
    • https://s3.amazonaws.com/batiku/algarrobo_arbol_informacion.pdfIn PDF document text
    • https://s3.amazonaws.com/waxegatulo/best_bollywood_songs_site_quora.pdfIn PDF document text
    • https://s3.amazonaws.com/mogedozara/elkhorn_slough_fishing_report.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cab3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCAB3 6436 bytes
SHA-256: 86208f4e563e6a3a4ea9b9e360edd53bfe6e082c8fbf202dbcf3364e6e885c23
font_01_sfnt_off0000e0ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0AC 5276 bytes
SHA-256: d1e2ebbcb0783086e516a07688cb98cb356ec574017d45fd8978275c108ee223
font_02_sfnt_off0000f2af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2AF 11364 bytes
SHA-256: 2f86d0d9a7f65002404d39617d69984ee4bd5e7a7f941b455344edbb939c7ce9
font_03_sfnt_off000119d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119D1 16204 bytes
SHA-256: a95eff378c135b1ab40d10b3cd1da1bafbc07f86005f57898d079c90d712ddbd

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