Malicious PDF — malware analysis report

Static analysis result for SHA-256 a4fdc1e0dc48885d…

MALICIOUS

PDF

32.2 KB Authoring application: PDFedit
MD5: f1d07ad40a5ce5ac65ebb930f10fa627 SHA-1: 38aa8307c3942b2a0dbd6709ccec3c819730f5ec SHA-256: a4fdc1e0dc48885d05b13f1b235a1444ec0d639645bc84de76e2a82c86a5d17a
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded URLs pointing to external PDF files, a technique often used for SEO spam or to distribute malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent. The embedded URLs are the primary IOCs, suggesting a link farm or redirection strategy.

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://cakes-bymaira.com/uploads/1/3/0/6/130603847/gefofajapuret.pdf
    • http://www.mediationparalegalboulder.com/uploads/1/3/0/2/130289409/e1c86da1d1cfe1.pdf
    • http://voicedirectorforgames.net/uploads/1/3/0/5/130550928/raweva_vukoveritazoso_xugimu.pdf
    • http://studentsmentalhealth.net/uploads/1/3/0/6/130620427/vawijusufiwa-dinuvatetuta.pdf
    • http://nieuwbuurttechniek.nl/uploads/1/3/0/4/130491488/3645779.pdf
    • http://dogoody.com/uploads/1/3/0/6/130604335/puvuf-podisavinopapa.pdf
    • http://winestains.net/uploads/1/3/0/7/130739616/jedenon.pdf
    • http://hostmaster.sislelifestyle.com/uploads/1/3/0/9/130968906/fa2df51b0.pdf
    • http://terbatas65.info/uploads/1/3/0/6/130603892/riroguw.pdf
    • http://www.movie-legends.co.uk/uploads/1/3/0/3/130313595/6163608.pdf
    • http://4us2wire.com/uploads/1/3/0/5/130588827/lowezediz.pdf
    • http://antiqueteddybearcrossing.com/uploads/1/3/0/7/130775922/1127207.pdf
    • http://brookwil.com/uploads/1/3/0/7/130740218/3366729.pdf
    • http://mx.pontoonboatsontario.com/uploads/1/3/0/6/130639554/94c0ba7e2b6.pdf
    • http://fcflow.com/uploads/1/3/0/2/130289317/39cacf6c3df158.pdf
    • http://autodiscover.shop-fit.com.au/uploads/1/3/0/5/130550859/lefafebuf.pdf
    • http://officialfazeroster.com/uploads/1/3/0/2/130272851/916c33f2.pdf
    • http://cpanel.thehealthystar.com/uploads/1/3/0/8/130814340/c3a29318.pdf
    • http://mymed.care/uploads/1/3/0/4/130490399/5774607.pdf
    • http://wowlook.org/uploads/1/3/0/3/130323803/6f51cadc8421e3b.pdf
    • http://host13.pleasingfood.com/uploads/1/3/0/2/130271240/130271240.html#adobe+acrobat+crop+pdf

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002022.bin
89c2a3a0f2dbd1787b180008b8f7b6cad7b91b73b2e8a5cd1050638f9e290d9d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2022 7216 bytes

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