Malicious PDF — malware analysis report

Static analysis result for SHA-256 b4057161ccc9fe71…

MALICIOUS

PDF

34.6 KB Authoring application: PDFBox
MD5: 99f594772538d696a70b9e291ef8c8bd SHA-1: 34454775a43d2cd74bbf3e8459567584d4178c80 SHA-256: b4057161ccc9fe7193cd3fa3417eb2d6198b53cf0fbd5fe92ba359ad9951722a
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded links to external PDF files hosted on various domains, a technique often used for SEO poisoning or to distribute malicious content. The ClamAV detection 'Pdf.Phishing.TtraffRobotInstall-7605656-0' and the ML classifier strongly indicate malicious intent. The document body, though truncated, mentions editing PDF files, which could be a lure to disguise the malicious nature of the links.

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://www.suzannesauragraphsandmore.com/uploads/1/3/1/0/131070457/tiwakom_rabed_libinizetibu.pdf
    • http://nancyjmiller.net/uploads/1/3/0/7/130775867/suvudat-najerigulafu-titibunixezukam.pdf
    • http://storiesandscreen.com/uploads/1/3/0/3/130313237/9cb29dfbcdfc.pdf
    • http://shop.trgld.yt/uploads/1/3/0/3/130379137/2899727.pdf
    • http://radiogirlcami.com/uploads/1/3/0/5/130544009/8334482.pdf
    • http://tillylawfirmmd.com/uploads/1/3/0/5/130542985/ropibetirigej.pdf
    • http://nedsunderscorewood.org/uploads/1/3/0/6/130620755/3d691641d12b5c.pdf
    • http://missinglinkarchives.com/uploads/1/3/0/7/130776260/848580.pdf
    • http://www.wealthcarejwolfe.com/uploads/1/3/0/6/130621495/wavoganati.pdf
    • http://deafhousemedia.com/uploads/1/3/0/4/130476395/sipowomamisig-xizeguve.pdf
    • http://muslimsjobs.com/uploads/1/3/0/5/130541272/kuzazax-zurod.pdf
    • http://our0genealogy.org/uploads/1/3/0/7/130739381/xuxuwoxewukofalogene.pdf
    • http://www.frysjagrafikkverksted.com/uploads/1/3/0/6/130604841/1407a22b1.pdf
    • http://www.blog.uvvc.ca/uploads/1/3/0/6/130604447/vikapijitegutov.pdf
    • http://contributingtominers.com/uploads/1/3/0/6/130620353/589ac.pdf
    • http://de-puy-hip-attorney.com/uploads/1/3/0/7/130738841/14232e0b.pdf
    • http://tqhlk.slpny.com/uploads/1/3/0/8/130874533/130874533.html#how+to+edit+pdf+file+in+acrobat+reader+dc

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002c4e.bin
90c9424025a848a5b1b6c6ff4a2d3fe4076db4f9f6b9d64627fa46843abf7de4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2C4E 7516 bytes

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