Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a0e085cbc939c07…

MALICIOUS

PDF

100.4 KB Authoring application: PDF Studio
MD5: 414056e9183eb09f397eca8581315b53 SHA-1: 962084d92c8ba90180205319f3cf750f1ca71f2f SHA-256: 7a0e085cbc939c0742643f318399ba5b161aade625ca76bb0c95db0138b0172c
192 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file exhibits characteristics of a link farm, containing numerous links to external PDF documents hosted on various domains. The heuristic 'PDF_SEO_LINK_FARM' and the presence of many unknown-reputation URLs strongly suggest this is not a legitimate document. The ML classifier and ClamAV detection further support its malicious nature, likely serving as a lure or a distribution point for further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9984

Heuristics 4

  • 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
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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://tructable.com/uploads/1/3/0/2/130270776/webuzumi.pdf
    • http://luckofseven.net/uploads/1/3/0/5/130588644/8577712.pdf
    • http://redraiderdelivery.com/uploads/1/3/0/5/130589998/mejitedeza.pdf
    • http://vpmsilverbars.com/uploads/1/3/0/6/130603741/1dbe0.pdf
    • http://brucepeninsulaadventure.com/uploads/1/3/0/3/130379479/4f7a8c0b.pdf
    • http://cpanel.allaboutdanceacademy.com/uploads/1/3/0/5/130544110/piwileme.pdf
    • http://blacklocustpastures.com/uploads/1/3/0/4/130476161/6846406.pdf
    • http://fiataudiosolutions.com/uploads/1/3/0/7/130775293/8507587.pdf
    • http://antiviruseonlineprotectservice.site/uploads/1/3/0/7/130775786/lolurula_zenolotuj_jezud.pdf
    • http://signofthesandman.net/uploads/1/3/0/2/130274370/2577215.pdf
    • http://www.hirechase.com/uploads/1/3/0/6/130620839/17d381395d60.pdf
    • http://huaqiaorenyulecheng.br3h.com/uploads/1/3/0/6/130640116/504003.pdf
    • http://q8caad.com/uploads/1/3/0/8/130813654/timupexizonoli_wewafu_vadopedatajof_nuvinewefido.pdf
    • http://host.creativedatainc.com/uploads/1/3/0/6/130621257/130621257.html#adb+shell+dumpsys+activity+intents
    • http://www.adobe.com/).Noto
    • http://www.google.com/get/noto/http://www.adobe.com/type/This
    • http://scripts.sil.org/OFLNoto

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_001_off00005b6f.bin
61da56863183906c43a6b15ac951df0cf285ffdce2bf1fc4c4aface6ecf3b7ac		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5B6F 73664 bytes
font_01_sfnt_off00013331.bin
7a88a75fe0b5f294c773e6facc30d3e82b63fc16a571f64ba22392b8af56bfd6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13331 8468 bytes

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