Malicious PDF — malware analysis report

Static analysis result for SHA-256 c433073bcf14f4f0…

MALICIOUS

PDF

63.3 KB Created: 2021-01-15 21:00:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a10f545e5479ed7d86c31bd16fd60943 SHA-1: eeaa36d05e71ae47029f953b18c463475e71750d SHA-256: c433073bcf14f4f0f057cb17cbbc59392a2b67087ce9c59f3533a8834d2fec47
214 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, with one identified as a malicious redirector. The document body, though heavily obfuscated, suggests a lure related to a 'pig personality test'. The presence of multiple external links and a malicious redirector indicates an attempt to lead the user to potentially harmful content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9650

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED
    The cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PDFSyntaxError. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.
  • 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://gettraff.ru/123?utm_term=pig+personality+test+powerpoint
    • https://mivodijabid.weebly.com/uploads/1/3/4/7/134732330/miduwunusuteb-suponeme.pdf
    • https://site-1168148.mozfiles.com/files/1168148/4d_live_wallpaper_2020_download.pdf
    • https://site-1246927.mozfiles.com/files/1246927/36263961810.pdf
    • https://cdn-cms.f-static.net/uploads/4365541/normal_5f89d8aacfc29.pdf
    • https://vomerigovelaj.weebly.com/uploads/1/3/4/9/134901888/guter_jaginato_vonorejasubejo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/fajonubinomeder/75163731557.pdf
    • https://s3.amazonaws.com/gelawiweza/70762065533.pdf
    • https://s3.amazonaws.com/rujimidujek/guardian_speedy_crossword_1210_answers.pdf
    • https://s3.amazonaws.com/dapekufoxiraku/tegegunepapoleriloxuza.pdf
    • https://s3.amazonaws.com/xenavuxa/takepuzogax.pdf
    • https://s3.amazonaws.com/gazijewevan/54789255682.pdf
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c7a1.bin
f68a1db821c325ca7f1447710eac9d6afef8b360c0ff8435d0179bef3c678d00		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC7A1 5184 bytes
font_01_sfnt_off0000d969.bin
dc641b80fa5f4aa6d6b49c42ca71b7b215d6b4bf6e2cc6e3fb21e52222899007		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD969 9872 bytes

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