Malicious PDF — malware analysis report

Static analysis result for SHA-256 a3a6dfc90f17bc1d…

MALICIOUS

PDF

44.6 KB Authoring application: PDFBox
MD5: 31d14aed84d7a2285960cbd71dc6d97c SHA-1: 5a0c85fbd381477c8593068d847d14e5a176dd99 SHA-256: a3a6dfc90f17bc1d91ac48eb63daf70f3043f3f29c69e4a456b756dc0a74b283
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded links to external PDF files hosted on various domains, as indicated by the PDF_SEO_LINK_FARM heuristic. This suggests a link farm or phishing campaign. The ML classifier and ClamAV detection further support the malicious nature of the file. No scripts were extracted from this sample.

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://dabispop.com/uploads/1/3/0/7/130738524/betexedapowiz_pituta_lixubifiliwage.pdf
    • http://ibhpalmsprings.com/uploads/1/3/0/6/130604161/3806788.pdf
    • http://noonecouldhavepredicted.com/uploads/1/3/0/4/130488974/d66e1f6f5.pdf
    • http://happystraystories.com/uploads/1/3/0/6/130620952/muwalebikutisug.pdf
    • http://derig.host/uploads/1/3/0/5/130588493/8994606.pdf
    • http://rimavop.store/uploads/1/3/0/5/130544086/e78c851.pdf
    • http://www.undefinedfades.com/uploads/1/3/0/6/130639892/nemovuwaxekonuvufox.pdf
    • http://helenwieffering.com/uploads/1/3/0/4/130436473/lijetexuzufeku.pdf
    • http://powerofproton3.website/uploads/1/3/0/6/130639157/55b1d8.pdf
    • http://mikevincentphotography.net/uploads/1/3/0/2/130291783/6873a564.pdf
    • http://drbrewer.net/uploads/1/3/0/7/130775545/2721561.pdf
    • http://alniyatbellydance.com/uploads/1/3/0/7/130775173/da3d2cc24e72495.pdf
    • http://qipaiyouxizenmezhuanqian.br3h.com/uploads/1/3/0/6/130621831/130621831.html#freeze-thaw+method+for+agrobacterium+transformation

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000036c7.bin
ddc6c38a5929b263b215a5b0c7aa8b1a409f146866f06980111f9f21a6232bf4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x36C7 16036 bytes
font_01_sfnt_off00004ade.bin
4d9ec2aec8f1ca6bebe1b56492fd55a77bba3a6e98efb76508c1b835d4eb9912		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4ADE 2860 bytes
font_02_sfnt_off0000574e.bin
a9d4916ca9e0456b015a7c519a87afc48ebd13b69a10df93503d9b4dd4c93649		 pdf-font-stream PDF embedded font (sfnt) at offset 0x574E 7600 bytes

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