Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d71aaf3550f9ef1…

MALICIOUS

PDF

39.7 KB Authoring application: PDF Studio
MD5: 2dc63e8dd957129309511b72e9e8e646 SHA-1: aee0912b006fd1b17d9588b125b492f9a147c60f SHA-256: 7d71aaf3550f9ef1d7472cc32361b854e63a8fef49bccc638a70a6297c1b70cf
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a large number of embedded external links, identified by the PDF_SEO_LINK_FARM heuristic. These links likely lead to malicious websites, as suggested by the ClamAV detection of 'Pdf.Phishing.TtraffRobotInstall-7605656-0'. The ML classifier also strongly indicated maliciousness. The primary goal appears to be redirecting users to potentially harmful content.

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://piwedigapiwoki.weebly.com/uploads/1/3/0/6/130604176/xonofupasidagibop.pdf
    • http://deardrew318.com/uploads/1/3/0/2/130291908/2780929.pdf
    • http://mister5foot18.com/uploads/1/3/0/6/130604780/gamerevomemefazija.pdf
    • http://trails4tailsfest.org/uploads/1/3/0/4/130490602/84246e1be.pdf
    • http://bem.infonetacademy.tech/uploads/2020/01/27/202736.pdf
    • http://manetaspark.net/uploads/1/3/0/2/130274291/f34729.pdf
    • http://nicoleolsthoorn.com/uploads/1/3/0/6/130621960/472953.pdf
    • http://cedarlanesucculents.com/uploads/1/3/0/2/130287937/3644958.pdf
    • http://steelcityselectsoftball.com/uploads/1/3/0/6/130620626/jusagamedamuzetu.pdf
    • http://nonnibarn.com/uploads/1/3/0/3/130323229/703e205ee0ab76.pdf
    • http://rejesuti.1medvrn.ru/uploads/2020/01/27/mesup_jopuwiga_naxikenarim.pdf
    • http://citruslist.com/uploads/1/3/0/3/130379179/5470429.pdf
    • http://davidmarquesibanez.com/uploads/1/3/0/4/130488700/130488700.html#the+hepcidin-anemia+axis+pathogenesis+of+anemia+in+chronic+kidney+disease
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://fedoraproject.org/wiki/Licensing/LiberationFontLicense

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001389.bin
ead3b3ee17559a4b63e52194d612d3bac8659e6e6755c98b6fe98f60baef7b57		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1389 8844 bytes
font_01_sfnt_off00005faa.bin
41d5c9cb4d60b7530e3cfd93a78efd430fe179aa57a8296e74fb8a971da4b0ee		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5FAA 2600 bytes

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