Malicious PDF — malware analysis report

Static analysis result for SHA-256 d11c1e87b671175c…

MALICIOUS

PDF

36.7 KB Authoring application: Smallpdf Desktop
MD5: 2ab842091e75c09115ce5b1a9dc24531 SHA-1: 6aa7ad355d820d4cc9aa372fae2cf13abb92704d SHA-256: d11c1e87b671175ca5fb47e3d1fe7830fd44e2c1ffd1023a8c9e9c361be2aac5
152 Risk Score

Malware Insights

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

The PDF document was flagged by multiple heuristics, including ClamAV and an ML classifier, as malicious. The primary indicator is a large number of embedded external links, identified as a 'PDF_SEO_LINK_FARM' heuristic. These links likely serve as a lure to redirect users to phishing sites or download further malicious content. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://authorkmdylan.com/uploads/1/3/0/2/130272291/8674595.pdf
    • http://miguxak.freelance-zone.xyz/uploads/2020/01/27/xelitewodufif.pdf
    • http://depewa.tehnews.ru/uploads/2020/01/29/bebivu.pdf
    • https://gekogosoz.weebly.com/uploads/1/3/0/2/130289226/5173476.pdf
    • http://zacharylink.com/uploads/1/3/0/5/130539846/8159508.pdf
    • http://allisongiessuebelhair.com/uploads/1/3/0/3/130313410/foxiwo.pdf
    • https://bemipefugoge.weebly.com/uploads/1/3/0/5/130551429/f559d39deb3.pdf
    • http://notyetapparel.com/uploads/1/3/0/6/130639105/37eb5fbb70.pdf
    • http://juzofanaze.vipiski-besplatno13.icu/uploads/2020/01/28/8118070.pdf
    • http://tonygezzi.com/uploads/1/3/0/4/130488979/nalerekakerabubo.pdf
    • http://kuhnimsc05.icu/uploads/2020/01/28/2114452.pdf
    • http://mam.trokot-shops.pro/uploads/2020/01/27/6881435.pdf
    • http://rebeccalaplacaattia.com/uploads/1/3/0/4/130478975/130478975.html#joules+dog+coat+size+guide

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000130f.bin
64c07d52d04a72a9381cf1c05d06ad2ead594fc0a6b9d182f704199b0e33b769		 pdf-font-stream PDF embedded font (sfnt) at offset 0x130F 8468 bytes

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