Malicious PDF — malware analysis report

Static analysis result for SHA-256 f7dee55c4b04f8c7…

MALICIOUS

PDF

44.3 KB Authoring application: Karbon
MD5: b86ee4389c438c0ea2c50c999ef36dc5 SHA-1: 448ed88e4786a3106e4d63521f579d412c0d1208 SHA-256: f7dee55c4b04f8c78481478a9f3a7581f85ce0351c83aa54479d38d34d06fbd1
150 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links to other PDF files, a technique commonly used for SEO poisoning and distributing malicious content. The ClamAV detection 'Pdf.Phishing.TtraffRobotInstall-7605656-0' and the ML classifier output strongly indicate malicious intent. The document body, though obfuscated, contains references to game downloads and includes numerous URLs, suggesting a lure to download further malicious payloads.

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://kuw.vneriska.ru/uploads/2020/01/29/gutibik.pdf
    • http://anotherdayatthefeast.com/uploads/1/3/0/5/130588343/jojidot.pdf
    • http://pinkgorillaejuice.com/uploads/1/3/0/4/130436209/gagir.pdf
    • http://queenseasyautocredit.com/uploads/1/3/0/5/130588716/73f299e119f6fd9.pdf
    • http://xidobaviv.studio-elephant.ru/uploads/2020/01/27/tinujatesidedow_xazekak_mijufomape_bizogabuvewon.pdf
    • http://centermetod.ru/uploads/2020/01/27/9609897.pdf
    • https://riramodisotake.weebly.com/uploads/1/3/0/4/130435862/414d2189.pdf
    • http://koffeestains.com/uploads/1/3/0/6/130620581/c6686df86a220.pdf
    • http://sargar.ru/uploads/2020/01/27/4284283.pdf
    • http://gego.glavmoskuhni.ru/uploads/2020/01/27/zawexurikanadi_bijug.pdf
    • http://wallracercar.info/uploads/2020/01/28/3087414.pdf
    • http://mongard.net/uploads/1/3/0/2/130288523/9765341.pdf
    • https://sozikegelikozu.weebly.com/uploads/1/3/0/4/130476649/b45435.pdf
    • http://luostarituote.fi/uploads/1/3/0/5/130551795/8520307.pdf
    • http://hardtoken.store/uploads/2020/01/27/zapubiwokiwikij.pdf
    • http://dawe.valpub.ru/uploads/2020/01/27/91f0b.pdf
    • http://londonpottersguild.org/uploads/1/3/0/2/130292110/mexazovojim.pdf
    • https://gowabonebopuluv.weebly.com/uploads/1/3/0/2/130289690/fotijevadofubupedin.pdf
    • http://markedsbistand.no/uploads/1/3/0/2/130272364/130272364.html#klasik+s%C3%BCper+mario+oyunu+indir

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000015d8.bin
25a1b97ddb7a0a8b1fd20ac6ee9001be149b35cdc65f532ea09f5e05432617c7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15D8 10760 bytes
font_01_sfnt_off000062a8.bin
ca97cd6040d51f0c31fbde432bd369509a7685ad59ac666f9649b50df0b8aabc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x62A8 17412 bytes

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