Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c284642d31fd7fd…

MALICIOUS

PDF

46.8 KB Authoring application: QPDF
MD5: ad0b01578b9063cbf0f7101a709b7b4d SHA-1: 346c451eb6fc43f29d05cccdf44e19eb30cef627 SHA-256: 7c284642d31fd7fd77f602d7961d38fe00c5b8ef0c57c0139f3a14847b4311a8
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded URLs pointing to external PDF files, a technique often used for SEO spam or to redirect users to malicious sites. The ClamAV detection as 'Pdf.Phishing.TtraffRobotInstall-7605656-0' and the ML classifier output strongly indicate malicious intent. The embedded URLs are likely part of a campaign to drive traffic to these external resources.

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 https://wowinaki.weebly.com/uploads/1/3/0/2/130288542/4323061.pdf
    • https://janonetujeja.weebly.com/uploads/1/3/0/3/130312969/pokiveneladuvesulivu.pdf
    • http://bikujimul.trk-kirovskiy.ru/uploads/2020/01/28/jijokozef_zebumopinutes_wixaxevetajawig.pdf
    • https://limejulila.weebly.com/uploads/1/3/0/4/130488920/20eb7c42fc1a.pdf
    • http://nofagns.xyz/uploads/2020/01/28/901cb1a4da4c08a.pdf
    • http://rorupudol.onlyoil.ru/uploads/2020/01/28/1049982.pdf
    • http://now.saintrussia-rp.ru/uploads/2020/01/28/2875206.pdf
    • http://xedogixe.hallo-mensen.com/uploads/2020/01/28/478a5b7e.pdf
    • http://realmsofreflections.com/uploads/1/3/0/4/130476034/sugamuwijepu_mozezesopejubur.pdf
    • http://xikut.ggdmetals.site/uploads/2020/01/27/7463681.pdf
    • http://sakof.blogfiscal.info/uploads/2020/01/27/xuzuvife.pdf
    • http://contemporaryartandfilm.com/uploads/1/3/0/4/130488875/5309774.pdf
    • http://dumo.ner1.ru/uploads/2020/01/27/9560769.pdf
    • http://technowall.online/uploads/2020/01/28/aad6c.pdf
    • http://mar.respektmebel.ru/uploads/2020/01/28/xulax-fisib-zejowutulafo-bozudowukajotup.pdf
    • http://theleawoodfamilydentist.com/uploads/1/3/0/2/130291624/130291624.html#star+trek+book+price+guide
    • http://linux.thai.net/projects/fonts-tlwg
    • http://www.thaitux.info

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000158f.bin
93132338dddb736160bb88bf324cc3239ef616889c6b75a7bc3efa7aaef5e5d0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x158F 7876 bytes
font_01_sfnt_off00006e14.bin
3eb4b2cea5944beed14372be996492f8da05ecb2c2a1d392e04caf7671f8bd8d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E14 10720 bytes

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