Malicious PDF — malware analysis report

Static analysis result for SHA-256 cffd429bd43cb194…

MALICIOUS

PDF

145.1 KB Created: 2015-08-25 15:07:25 +03:00 Authoring application: wkhtmltopdf 0.12.2.4 (via Qt 4.8.6)
MD5: 55e6c720ca50a68032b5497bda11c6e0 SHA-1: ec810afc8b8d35413db9cca15ce1fb1b972896a2 SHA-256: cffd429bd43cb1943941936089d856b3962d92ea2bb679d188d4a022d60b6c77
80 Risk Score

Malware Insights

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

The PDF was identified as an image-only document with an action trigger, typical of a phishing lure. It contains a critical heuristic firing for a malicious redirector link pointing to http://botcraftman.ru/?lip&keyword=03&charset=utf-8. The document body is heavily obfuscated, but the overall structure and the malicious URL strongly indicate a phishing attempt to redirect the user to a harmful site.

Heuristics 3

  • 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.
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 145 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://botcraftman.ru/?lip&keyword=03&charset=utf-8
    • http://img1.liveinternet.ru/images/attach/c/7//4731/4731878_forge__181_.pdf
    • http://img1.liveinternet.ru/images/attach/c/7//4731/4731084_zhidkokristallicheskie__displei__av_.pdf
    • http://img1.liveinternet.ru/images/attach/c/7//4731/4731258_skachat__pesni__s_.pdf

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000213f4.bin
16797f5bd128092be9608ffd3dc8e2770a4dbc80002c382cae0ca32e55770265		 pdf-font-stream PDF embedded font (sfnt) at offset 0x213F4 7168 bytes
font_01_sfnt_off000228c7.bin
479e6a39b35833196b6a0e29e87dfd73998881f9bd6f811332f80dba3e31f242		 pdf-font-stream PDF embedded font (sfnt) at offset 0x228C7 8456 bytes

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