Malicious PDF — malware analysis report

Static analysis result for SHA-256 a06cc132c9ca28db…

MALICIOUS

PDF

89.0 KB Created: 2021-02-22 09:00:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 691d42036d3479d8114253fbefdbb2fe SHA-1: 316be2c76e7f2ca2b9eac4da1edb4ba0804a7fea SHA-256: a06cc132c9ca28dbcf3beb2af464c4e386c9bead36d605a70e6a4cd9e7dec30c
96 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The embedded URL, https://maypoin.ru/wix?keyword=okuma+guide+select+pro+2-6lb, suggests a phishing attempt or redirection to a malicious site. While no scripts were explicitly extracted, the PDF structure and embedded URI heuristic point towards a common attack pattern of using documents to redirect users to external malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://maypoin.ru/wix?keyword=okuma+guide+select+pro+2-6lb
    • http://reduslim-official.website/6989552331744p95.pdf
    • http://jotijitod.66ghz.com/pawumekojijiki.pdf
    • https://static.s123-cdn-static.com/uploads/4393193/normal_5ff8583c7ea7a.pdf
    • http://basvuruizleme.online/83382770820cv21x.pdf
    • https://cdn-cms.f-static.net/uploads/4375076/normal_5fdb1af534fa2.pdf
    • https://wefigoga.weebly.com/uploads/1/3/4/0/134041661/3189911.pdf
    • http://bbcua.site/92078454707761t3.pdf
    • https://cdn-cms.f-static.net/uploads/4407062/normal_6010d0fed8e5d.pdf
    • http://mugedly.xyz/16581263565zmlio.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://damikofem.rf.gd/cinema_guide_melbourne.pdf
    • http://dupozeb.rf.gd/87671660059.pdf
    • http://fowasabitafal.epizy.com/vafob.pdf
    • https://s3.amazonaws.com/likadojivivofu/neonatal_jaundice.pdf
    • https://s3.amazonaws.com/jidagafinuxesu/52042861607.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011d8b.bin
6adba68b09acd51b4295c8f15f475b5d08b1943f46f6c0483c600220a15166d2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11D8B 5944 bytes
font_01_sfnt_off000131af.bin
0e7d36b60fe92c9b4a66b404a7188c4e4246daeaedcd15c9406fec0ae0397b4e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x131AF 10924 bytes

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