Malicious PDF — malware analysis report

Static analysis result for SHA-256 f5a8fdc5b64c41fb…

MALICIOUS

PDF

32.0 KB Authoring application: PDFBox
MD5: 63275d4a8156525af2a7578f0c813968 SHA-1: e8064cc9fe4363c3178c908d03324f6fe9dc6427 SHA-256: f5a8fdc5b64c41fb0ac686dceb8060e72c38ace855fd5e925383a2ce58f6e0cb
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded external links, a technique often used for SEO manipulation or to redirect users to phishing or malware distribution sites. The ClamAV detection 'Pdf.Phishing.TtraffRobotInstall-7605656-0' further supports a malicious intent. No scripts were extracted, and the document body contained mostly garbled data, making it difficult to ascertain the exact lure.

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://gepazulawab.weebly.com/uploads/1/3/0/2/130287367/4cea8aa0.pdf
    • http://hesperianmusic.com/uploads/1/3/0/2/130291635/bisujasemunuji_povewexop_judidinulifolaz.pdf
    • https://kixujibij.weebly.com/uploads/1/3/0/3/130313453/vifalu_kabusevadibi_megud.pdf
    • https://botojuzuxadapa.weebly.com/uploads/1/3/0/4/130436271/0ae17.pdf
    • http://spectrum-capital.com/uploads/1/3/0/4/130476101/1673309.pdf
    • http://lastlookny.com/uploads/1/3/0/5/130539340/cd0b41892e.pdf
    • http://wemopuv.karmafx.pro/uploads/2020/01/29/zozusojixizivejow.pdf
    • http://betsybower.com/uploads/1/3/0/6/130604378/8bb6c77d0a3.pdf
    • http://wadale.theodoro.ru/uploads/2020/01/29/supiromekabelawu.pdf
    • https://nukijofifokij.weebly.com/uploads/1/3/0/4/130436458/fenevebew.pdf
    • http://newparanormalsociety.com/uploads/1/3/0/3/130313230/polur.pdf
    • https://ziposuzi.weebly.com/uploads/1/3/0/3/130379192/3778347.pdf
    • http://angeloakfitness.com/uploads/1/3/0/5/130540065/2185e4b7.pdf
    • http://tej.polimernye.ru/uploads/2020/01/28/3273148.pdf
    • http://kakek.vipiski-besplatno29.icu/uploads/2020/01/28/1459367.pdf
    • http://wtls.us/uploads/1/3/0/5/130588773/9412091.pdf
    • http://tseh.su/uploads/2020/01/29/d9e4dd7e14f.pdf
    • http://beingself-centered.com/uploads/1/3/0/6/130605196/130605196.html#connected.mcgraw-hill+lesson+2+5th+grade

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001460.bin
8538de3d969a3475077b6d21da7d0810ddf8703dc0424261d7e8d349d81911d9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1460 7336 bytes

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