Malicious PDF — malware analysis report

Static analysis result for SHA-256 42e50199d583bd1e…

MALICIOUS

PDF

98.6 KB Authoring application: Serif PagePlus
MD5: b19cd63d08aabe0117af4bfb1d9f9b9b SHA-1: e8e9e59504091b8f7c4394bad6b57f86393acf79 SHA-256: 42e50199d583bd1e37ecb363da5d542ebbf0f42eb515def4128d8920a359f42e
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF was flagged by ClamAV as 'Pdf.Phishing.TtraffRobotInstall-7605656-0' and a machine learning classifier indicated a high probability of maliciousness. The heuristic 'PDF_SEO_LINK_FARM' indicates the document contains multiple external links, with the primary one being http://venoja.gictorin.ru/uploads/2020/01/28/jelevev_vavuzawesenabu_gelixura_vobexuwumo.pdf. The document body, though partially corrupted, contains references to 'Bernoulli filter manual' and includes several URLs, suggesting a phishing or redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9916

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://venoja.gictorin.ru/uploads/2020/01/28/jelevev_vavuzawesenabu_gelixura_vobexuwumo.pdf
    • https://munajitab.weebly.com/uploads/1/3/0/5/130590521/61d572c5.pdf
    • http://houseofmapa.com/uploads/1/3/0/4/130483781/7621889.pdf
    • http://moodlabnewlife.nl/uploads/1/3/0/7/130775180/130775180.html#bernoulli+filter+manual

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001180.bin
838fb25c5d4299d593f3c2612bb02d9c7ed286270c194fcdb1d693828c532ff3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1180 10628 bytes
font_01_sfnt_off000087c4.bin
0daa617ca3dbb09d8cfdf4b2392dc2d1b3df85a9515f579e1c8be0d5e7827d45		 pdf-font-stream PDF embedded font (sfnt) at offset 0x87C4 16244 bytes
font_02_sfnt_off0001461e.bin
5bf691b87863c034c0c04e6695ba267cf0bbcca70d876eec2465aa14d00c8e61		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1461E 4328 bytes

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