Malicious PDF — malware analysis report

Static analysis result for SHA-256 1813c372ce38f734…

MALICIOUS

PDF

34.8 KB Authoring application: ImageMagick
MD5: da5a7bbb3cbf1ca4d6e0397791a9af62 SHA-1: 4cb434bcf9d8dfd0f5504bec0550c11000fc9294 SHA-256: 1813c372ce38f734d368e5281e0ef538d3ac41d7ff00b52f114d7916fca998f7
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, indicating malicious intent. The primary finding is a large number of embedded external links to other PDF files, suggesting a link farm or a distribution mechanism for further malicious content. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a phishing or spam campaign, likely initiated via a spearphishing attachment.

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 http://midwestpsn.org/uploads/1/3/0/5/130590550/9675272.pdf
    • http://noodlecontent.com/uploads/1/3/0/5/130588584/mibofaxufukumikisu.pdf
    • http://101taiwantour.com/uploads/1/3/0/5/130590400/bewusudovalunisid.pdf
    • http://goodbreak.ru/uploads/2020/01/28/f78ee2ba.pdf
    • http://naka-g.creps-inc.jp/uploads/1/3/0/2/130287457/2242c.pdf
    • http://canberrabirthservices.com/uploads/1/3/0/4/130476104/lejenarap_vigowe_wajamefeba.pdf
    • http://journey2wholeness.net/uploads/1/3/0/6/130620650/tijupexiz.pdf
    • http://michaeldeaton.com/uploads/1/3/0/5/130551405/24816d99b.pdf
    • http://developmentechnwkllc.com/uploads/1/3/0/3/130379081/164f8.pdf
    • http://bodydelux.com/uploads/1/3/0/6/130639913/7211423.pdf
    • http://datokezu.synweshare.com/uploads/2020/01/28/fakegebexowoso-tokubaxaw-vexodivalivesin-togusuvara.pdf
    • http://portlandareabankruptcy.com/uploads/1/3/0/5/130542875/6f76c9878c4a321.pdf
    • http://vehicleloanusa.com/uploads/1/3/0/6/130639852/62e8e6bd93b847.pdf
    • http://dementiafriendlycapecod.org/uploads/1/3/0/4/130476145/ef234.pdf
    • http://petahuk.store/uploads/1/3/0/5/130588795/lelukejiwizi_rujogekusadowu_bukenena_tikageluj.pdf
    • http://mwvrc.org/uploads/1/3/0/5/130590582/4459845.pdf
    • http://newmanstage.com/uploads/1/3/0/5/130539255/felefemebuvol-rupuginugexopok.pdf
    • http://onewesterra.com/uploads/1/3/0/5/130588282/c760faa255.pdf
    • http://soulscriticalpath.com/uploads/1/3/0/5/130588850/59ccd7fba3b50.pdf
    • http://nysmaplepartridge.com/uploads/1/3/0/6/130620962/nuxugow-zuzizanuwiv-tijev-fuwoboseraxife.pdf
    • http://jbweddingphotography.com/uploads/1/3/0/4/130483393/xulosataxawefuwose.pdf
    • http://missturquoisecircuit.com/uploads/1/3/0/6/130621500/pazefexuti.pdf
    • http://crowlitmag.com/uploads/1/3/0/4/130489386/vaminipo-puvuzebomu.pdf
    • http://artofmoses.com/uploads/1/3/0/4/130489052/7390510.pdf
    • http://kreativekidsworld.com/uploads/1/3/0/2/130288392/130288392.html#august+rush+movie+answers

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001781.bin
0ae6cf64747258fe1f504c88a4e0002bff347a483c5067fb8f73aa4a498f0ab3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1781 7508 bytes

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