Malicious PDF — malware analysis report

Static analysis result for SHA-256 109d0b5016a78d48…

MALICIOUS

PDF

37.9 KB Authoring application: pstoedit
MD5: cfdf13b1ea48bb539ce2bf0d72d295d9 SHA-1: e26bc4bf657983f849c221725889484067bfc600 SHA-256: 109d0b5016a78d48ec578411cc06cb8cce9bc161ece46ba35f9175acc6b0c2a3
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a large number of embedded URLs pointing to other PDF files, a technique often used for SEO spam or to host malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. No scripts were extracted, but the embedded URLs are the primary indicators of compromise.

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://rbrealty.ca/uploads/1/3/0/6/130604231/jinonugitore-derojasavur.pdf
    • http://frogpigpug.com/uploads/1/3/0/5/130590140/1390936.pdf
    • http://fobuko.trytoberich.com/uploads/2020/01/28/6828910.pdf
    • http://piwaxexera.nsuxa.net/uploads/2020/01/28/lamepujujujaninef.pdf
    • http://geronona.mmoobzor.ru/uploads/2020/01/29/fejamop.pdf
    • http://gaketo.nikulin-ildar.ru/uploads/2020/01/27/fd66fbd6dae917.pdf
    • http://mysunfast3200.com/uploads/1/3/0/6/130605393/tefixagisunebufu.pdf
    • http://supervasya.ru/uploads/2020/01/28/zerujepefuzomipuxik.pdf
    • http://clearcaptioner.tech/uploads/2020/01/29/kovatizom_xasufu_metuxo.pdf
    • https://lozolirowob.weebly.com/uploads/1/3/0/5/130545241/9498863.pdf
    • http://limese.favorsvet.com/uploads/2020/01/28/3561554.pdf
    • http://bobomim.viptip.pro/uploads/2020/01/28/1465666.pdf
    • http://vanbrinkenco.com/uploads/1/3/0/3/130379696/wuwetuga.pdf
    • http://ashtakam.com/uploads/1/3/0/3/130324451/70a33ba70e6fe40.pdf
    • http://hammerheadgraphix.com/uploads/1/3/0/4/130477351/90a22acf46206b3.pdf
    • http://dedesrepus.com/uploads/1/3/0/6/130603793/busuzikegugurugu.pdf
    • http://pisesale.gk-absolutstroy.ru/uploads/2020/01/28/4209088.pdf
    • http://outsidecraft.su/uploads/2020/01/29/7d5a13edf90.pdf
    • http://onewesterra.com/uploads/1/3/0/6/130621582/sosofagaburas.pdf
    • http://sunsetsailkeywest.co/uploads/1/3/0/5/130539660/0933ff93.pdf
    • http://47ranchoregon.com/uploads/1/3/0/4/130483736/jitutolu.pdf
    • http://somersetfoodtrail.org/uploads/1/3/0/3/130379589/130379589.html#the+lover+marguerite+duras+epub+down

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001634.bin
d847419ab135bb999e876fe2a6ce484637915b5b6b71e18261fd4146a83f988a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1634 8980 bytes

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