Malicious PDF — malware analysis report

Static analysis result for SHA-256 bbf952d526ffa2a2…

MALICIOUS

PDF

44.7 KB Authoring application: GIMP
MD5: fdc7caa7658786037a3a2db10563c074 SHA-1: 2cf3a5a77260aa7b3f86e4ab934bf48caa732632 SHA-256: bbf952d526ffa2a2266963c79621d7adace1a80bde2a27a0c13a51e8c722721b
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded URLs pointing to other PDF files, a technique often used for SEO spam or to distribute malicious content. The ClamAV detection 'Pdf.Phishing.TtraffRobotInstall-7605656-0' and the ML classifier output strongly indicate malicious intent. The document body itself is largely unreadable due to encoding issues, but the presence of URLs and the heuristic firings are sufficient to assess the attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://kibudiva.weebly.com/uploads/1/3/0/5/130544437/tavarakogakinuzilu.pdf
    • https://senoropono.weebly.com/uploads/1/3/0/5/130550895/52f472.pdf
    • https://sojufelabo.weebly.com/uploads/1/3/0/4/130488395/6035802.pdf
    • http://nikaspaus.com/uploads/1/3/0/2/130272619/zeworofuxuzazu_jifiguturupubuz.pdf
    • http://lovewarrioryogaschool.com/uploads/1/3/0/5/130590157/fd820f.pdf
    • http://licacu.com/uploads/1/3/0/5/130589281/xebedimix.pdf
    • http://nelsonbaypreschool.com/uploads/1/3/0/5/130551137/samezadi.pdf
    • http://zowesox.antivirussguardservice.xyz/uploads/2020/01/29/b5aed0e6040b.pdf
    • http://malunuj.pdazip.ru/uploads/2020/01/27/142819.pdf
    • https://vorimitimo.weebly.com/uploads/1/3/0/2/130288532/fakogokar_kevezojur_wotop_bexok.pdf
    • http://camellanorthluzon.com/uploads/1/3/0/5/130551181/e846147f1d992b3.pdf
    • https://vumumijejaki.weebly.com/uploads/1/3/0/5/130538818/6113424.pdf
    • http://jekenif.paulcotyantiques.com/uploads/2020/01/28/7930338.pdf
    • http://mike4congress.com/uploads/1/3/0/5/130588467/8ca7e7.pdf
    • http://kod.garagrus.ru/uploads/2020/01/27/jozuvekarurexa.pdf
    • http://leadinlife.fun/uploads/2020/01/28/d8ff3.pdf
    • http://blsconsultingfirm.com/uploads/1/3/0/6/130620897/b997c.pdf
    • http://hawkecreations.online/uploads/1/3/0/2/130289792/kujosikuvav.pdf
    • http://razorut.accessory-app.com/uploads/2020/01/27/540538.pdf
    • http://photographictreasures.org/uploads/1/3/0/6/130621015/6634771.pdf
    • http://jiwewenapa.pas-safe.com/uploads/2020/01/28/4055702.pdf
    • http://kpvirtualsolutions.com/uploads/1/3/0/6/130622066/natevesudaz.pdf
    • http://jpphillips.org/uploads/1/3/0/6/130604579/6648607.pdf
    • http://ladadetail.net/uploads/2020/01/28/8790509.pdf
    • http://thesingbabysingshow.com/uploads/1/3/0/6/130604716/130604716.html#digestion+and+absorption+of+food+pdf

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000016a1.bin
db6e2db772a7fe23b41af90bad0402f9b976fb46b2ea5f89d6f01c747c7a45a5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x16A1 8104 bytes

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