Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e6220d610f63db6…

MALICIOUS

PDF

37.8 KB Authoring application: Pdftk
MD5: 2924939516415aea86d96d8605795c05 SHA-1: f125412de5a6757f18280be2bcce68d5efa6bc06 SHA-256: 4e6220d610f63db6c7aff1e3c9ed66c9800fe70c92b1d4ddd42172410b93f280
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a large number of embedded links to external PDF files, a technique often used for SEO manipulation or to distribute malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent. The document body text is heavily obfuscated and does not provide clear user-facing content, but the overall structure and heuristic firings point to a link farm attack.

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://nordbygdahandball.no/uploads/1/3/0/6/130621043/mixawigapagonet_butejatawabob_bujopinuboro.pdf
    • http://kunalsen.org.uk/uploads/1/3/0/4/130476348/runudovoxefi.pdf
    • http://greenburgheleven.com/uploads/1/3/0/6/130621063/4fa153c7748.pdf
    • http://spaceforcegaming.com/uploads/1/3/0/8/130814731/wovake-watujamu-bamapesekafo-fuxesubebe.pdf
    • http://shannanstanciuforschoolboard.com/uploads/1/3/0/2/130289344/mikupug.pdf
    • http://n2everything.com/uploads/1/3/0/4/130476161/d3f459b27f65.pdf
    • http://ladyshades.com/uploads/1/3/0/6/130604201/c085c9b.pdf
    • http://filmroar.com/uploads/1/3/0/7/130740249/36b8823445475.pdf
    • http://buysanfordrealestate.com/uploads/1/3/0/5/130540714/senad_girukimugi_jurepo_jijesiti.pdf
    • http://ahaawards.com/uploads/1/3/0/5/130539659/4845097.pdf
    • http://spineandnerves.com/uploads/1/3/0/7/130775293/nojoveraw.pdf
    • http://www.cassieorduno.com/uploads/1/3/0/6/130620154/suxopo-buxurok-fesatotagifenu.pdf
    • http://deidredanielle.shop/uploads/1/3/0/6/130603761/9882531.pdf
    • http://k9ssolutions.com/uploads/1/3/0/7/130738998/8c3b761d8a4b.pdf
    • http://datagents.com/uploads/1/3/0/3/130323601/gobenogike_zavep.pdf
    • http://whattimeisitinchina.com/uploads/1/3/0/4/130435772/e2069f.pdf
    • http://curriculum.rpstech.org/uploads/1/3/0/4/130483417/nilabororewozupujo.pdf
    • http://browngreasefuel.com/uploads/1/3/0/6/130620882/1044997.pdf
    • http://dollarwitch.com/uploads/1/3/0/8/130873990/6914586.pdf
    • http://stubblefieldhoa.com/uploads/1/3/0/5/130551880/a3c26ea040d9ea.pdf
    • http://shop.trgld.yt/uploads/1/3/0/5/130590719/8ba742.pdf
    • http://christianambulancenetwork.com/uploads/1/3/0/6/130605346/niketek_dotaw.pdf
    • http://www.elizabethrshanklin.com/uploads/1/3/0/6/130605448/b4031e7505f1e5f.pdf
    • http://vixenpromakeup.com/uploads/1/3/0/4/130488583/xagov.pdf
    • http://c0171196xstreamtravel.xsideas.com/uploads/1/3/0/2/130272333/130272333.html#coffee+break+spanish+pdf+download+free

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000030a6.bin
77374afd57e0775f21e65a28009f3b63723782ad2d0ef48c14f71d0898e47b47		 pdf-font-stream PDF embedded font (sfnt) at offset 0x30A6 7644 bytes

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