Malicious PDF — malware analysis report

Static analysis result for SHA-256 c07674835b19c37b…

MALICIOUS

PDF

50.2 KB Authoring application: pstoedit
MD5: b3f40d205e32166543b62486d358c5e6 SHA-1: d740e9a892e38a91e4fe3400b08a1ec66b5f27da SHA-256: c07674835b19c37b12723666279a28a394c7c1d25fdca84d17fc0a356b2a1f86
150 Risk Score

Malware Insights

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

This PDF file was detected as malicious by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.TtraffRobotInstall-7605656-0' and a PDF link farm heuristic. The file contains numerous embedded URLs pointing to external PDF documents, suggesting a phishing or redirection campaign. The document body, though heavily obfuscated, mentions 'Zkteco access control manual pdf', likely a lure to entice users to click the malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.TtraffRobotInstall-7605656-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.TtraffRobotInstall-7605656-0
  • 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 http://iqseries.de/uploads/1/3/0/5/130588586/petorekaxoj-nuviv-pesiwasinobe-nuwuxajujilomi.pdf
    • http://district197middleschoolsports.com/uploads/1/3/0/5/130551675/zafupamavuwe.pdf
    • http://gowalag.kangaroo-shop.ru/uploads/2020/01/29/36202844a.pdf
    • http://mtnequipment.co/uploads/1/3/0/2/130271143/puzud.pdf
    • http://dirtylittleclaws.com/uploads/1/3/0/4/130435532/d957a4a1d260.pdf
    • http://montanahollidayglass.com/uploads/1/3/0/4/130436451/3458165.pdf
    • http://neringa.us/uploads/1/3/0/6/130639651/kotatuvi-linugakadi-jeniwudolu.pdf
    • http://pausejudgement.com/uploads/1/3/0/4/130435598/xixunasewejagopeso.pdf
    • http://aesthetiderm.com/uploads/1/3/0/4/130477249/534181.pdf
    • http://churchofchrist-wellston.com/uploads/1/3/0/4/130435884/c1fdebbbf8acd15.pdf
    • http://dujo.pmwork.ru/uploads/2020/01/29/8118873.pdf
    • https://gerevoxenuwubus.weebly.com/uploads/1/3/0/3/130313643/255bb9580a9bd00.pdf
    • http://nobuhotelmarbella.devsite-1.com/uploads/1/3/0/2/130272483/130272483.html#zkteco+access+control+manual+pdf

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001391.bin
a221f441f85309697f2de5fac00191a7bd0e74ce8bdc214731b0fcb567e18c7e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1391 8684 bytes
font_01_sfnt_off00007c21.bin
a3fa56242e5b28b2d28453e3f63f95f323b6fa8d6a6d3ad4ccd5501e37b161b3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C21 16712 bytes

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