Malicious PDF — malware analysis report

Static analysis result for SHA-256 b1a35d640a8fcc59…

MALICIOUS

PDF

38.7 KB Authoring application: OpenOffice Draw
MD5: 07f15d90dd771ce963e2dc28ea69dfd8 SHA-1: 7e2b90d0cd0240640ace5e0c97c891debec25f8d SHA-256: b1a35d640a8fcc596e80af9d3119e00071f526d149a18bedc42928b2ad09f50c
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file was identified as malicious by ClamAV and a machine learning classifier, exhibiting characteristics of a link farm. It contains numerous embedded URLs pointing to external PDF files, suggesting a tactic to manipulate search engine results or distribute further malicious content. The primary heuristic firing indicates a mass external PDF link farm, with `turnberrypress.com` being a dominant host.

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://turnberrypress.com/uploads/1/3/0/3/130379445/54848b60.pdf
    • http://derwoodmarket.org/uploads/1/3/0/4/130490193/ruzimajik.pdf
    • https://nuvugabareseso.weebly.com/uploads/1/3/0/5/130543757/sazepinamuxusu-zejijonazexak-dobesomiwozuj.pdf
    • http://zud.asdklo.xyz/uploads/2020/01/28/5877239.pdf
    • http://mountainlifemontana.com/uploads/1/3/0/5/130589371/53017.pdf
    • http://labuenasemillabcn.com/uploads/2020/01/27/8013762.pdf
    • http://bonviewmodern.com/uploads/1/3/0/3/130313015/meganu.pdf
    • http://whatthehula.net/uploads/1/3/0/5/130588773/2986869.pdf
    • http://alamodecollections.com/uploads/1/3/0/4/130483864/korexeburixadep.pdf
    • http://xarovebo.myshop8.site/uploads/2020/01/28/lapopatimubapajaxav.pdf
    • http://dij.hlfxdata.online/uploads/2020/01/29/562bd3d9f7f5.pdf
    • http://trawallaprimary.com/uploads/1/3/0/4/130476340/zinomorenet.pdf
    • https://zemagitisexubil.weebly.com/uploads/1/3/0/5/130551002/4211245.pdf
    • http://collinsmslibrary.org/uploads/1/3/0/3/130323182/5678555.pdf
    • http://reemstechnology.com/uploads/1/3/0/4/130477309/mefokogob_jolomiso.pdf
    • http://intentionalfitness.club/uploads/1/3/0/3/130313333/6401238.pdf
    • http://jani.sardelas.ru/uploads/2020/01/28/6b6129.pdf
    • http://redrivercleaningco.com/uploads/1/3/0/3/130324137/5269470.pdf
    • http://toniabasihill.com/uploads/1/3/0/4/130436049/lezufamorux-sitekoxiz-zulazefexijut-gexamuwenu.pdf
    • http://noodlecontent.com/uploads/1/3/0/5/130589180/newutojewasapo_nitarekefuzel.pdf
    • https://vilamati.weebly.com/uploads/1/3/0/3/130323477/4f1f98271b18f.pdf
    • http://nupelicanparty.org/uploads/1/3/0/2/130288419/130288419.html#the+cambrian+newspaper+pdf

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000167e.bin
4e93f6af13f784e866dd64991f2b63365026da2c3563988969af57a4bf0f1197		 pdf-font-stream PDF embedded font (sfnt) at offset 0x167E 8420 bytes

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