Malicious PDF — malware analysis report

Static analysis result for SHA-256 c1c2c5c519eb1f7a…

MALICIOUS

PDF

36.0 KB Authoring application: PDFedit
MD5: f3d4335e84150eaaeaa63c4cfe20498e SHA-1: b4cdb3e88a83a0b44fd95cd02ff6231d1fab8cb5 SHA-256: c1c2c5c519eb1f7a3fa19acd83a6d1b837f255c4f7e9fc89a81164a12c0524e2
150 Risk Score

Malware Insights

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

The PDF was flagged by multiple heuristics, including ClamAV and an ML classifier, indicating malicious intent. The critical PDF_SEO_LINK_FARM heuristic fired, revealing a mass of external PDF links, with the primary URL being http://fukizonug.cryptopress.pro/uploads/2020/01/29/vexakosotulod-dazogusel-kiposepadajurer-kizumasafu.pdf. This suggests a phishing or malware distribution campaign leveraging SEO techniques to disguise malicious links. No scripts were extracted, but the embedded URLs are the primary indicators of compromise.

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://fukizonug.cryptopress.pro/uploads/2020/01/29/vexakosotulod-dazogusel-kiposepadajurer-kizumasafu.pdf
    • https://zenuwalag.weebly.com/uploads/1/3/0/5/130551247/kusal.pdf
    • http://xudi.ecsog.ru/uploads/2020/01/28/71158.pdf
    • http://tumezop.biofermentor.net/uploads/2020/01/29/bevagatokabusosex.pdf
    • http://ranibijen.veredas.online/uploads/2020/01/27/fefudawukowima-fanuzozud-navinumitugem.pdf
    • https://vobarofalibafe.weebly.com/uploads/1/3/0/4/130483765/falawob_gowixuxi_poseku_sozaf.pdf
    • http://parfumsoo.ru/uploads/2020/01/27/2242199.pdf
    • http://ff14gg.top/uploads/2020/01/29/xugakojijiviw-sudatef.pdf
    • http://crossroadsumcanderson.org/uploads/1/3/0/3/130379482/xinasogududitev_wabid_nefidimaxix_temikefematoduj.pdf
    • http://telapupi.alika.icu/uploads/2020/01/27/piwikopepidudo.pdf
    • http://siroz.z-kiski.fun/uploads/2020/01/27/95675a126f.pdf
    • https://davavipomoweta.weebly.com/uploads/1/3/0/6/130603932/ruvujone.pdf
    • http://skycloudcity.com/uploads/1/3/0/2/130291649/921982.pdf
    • http://konidarisart.com/uploads/1/3/0/5/130589165/985ee3.pdf
    • http://rockthecatspa.biz/uploads/1/3/0/6/130621300/7500089.pdf
    • http://chewoncakes.com/uploads/1/3/0/2/130288338/130288338.html#simple+present+tense+pdf+for+beginners

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000015e3.bin
a92713eea27df2bb546ff8f905e002591918d259597e9103f083127823969f98		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15E3 7480 bytes
font_01_sfnt_off000050de.bin
41d5c9cb4d60b7530e3cfd93a78efd430fe179aa57a8296e74fb8a971da4b0ee		 pdf-font-stream PDF embedded font (sfnt) at offset 0x50DE 2600 bytes

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