Malicious PDF — malware analysis report

Static analysis result for SHA-256 03b72436fbf8e478…

MALICIOUS

PDF

46.6 KB Authoring application: PDFBox
MD5: 3fb4df7868374457f74bce59e1c69106 SHA-1: 7731e33177798aff67ba2684e508b58827c33059 SHA-256: 03b72436fbf8e478da59b47e8be2cf5013e66fbdeb4ca0f3c577dd15eef1417d
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded URLs pointing to other PDF files hosted on various domains, indicating a link farm or distribution mechanism. ClamAV identified this as 'Pdf.Phishing.TtraffRobotInstall-7605656-0', and a critical heuristic detected a 'PDF_SEO_LINK_FARM'. The ML classifier also flagged it with high confidence. No scripts were extracted, and the document body was heavily corrupted, preventing analysis of its direct content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://aleriongames.us/uploads/1/3/0/6/130639410/8111a4d9a35d9c.pdf
    • http://plainenglishfordoctors.com/uploads/1/3/0/6/130639263/bupapuke.pdf
    • http://mta-sts.mail.artisticreteleesburg.com/uploads/1/3/0/6/130603743/adbbea9be1d7b5e.pdf
    • http://becker-energie.fr/uploads/1/3/0/7/130738512/xivupasunenasujobab.pdf
    • http://indysponsors.com/uploads/1/3/0/6/130621142/zesalo-tonijomej-nekuzu.pdf
    • http://colinaway.com/uploads/1/3/0/6/130639563/nuzusakamiparaziwow.pdf
    • http://sublimepainting.net/uploads/1/3/0/6/130621003/kezujutipag.pdf
    • http://ecuadoroscuro.com/uploads/1/3/0/7/130775129/pelexojorubi.pdf
    • http://quillicus.com/uploads/1/3/0/5/130539479/3ab3e8f0.pdf
    • http://shop.technicalapexx.org/uploads/1/3/0/5/130550803/xegibuzipek_fexupolixubupot.pdf
    • http://5toolgroup.com/uploads/1/3/0/6/130621048/8700339.pdf
    • http://michaeljamesvocals.com/uploads/1/3/0/7/130740598/gogevuwelitix.pdf
    • http://www.jaiersoccer.com/uploads/1/3/0/6/130622009/zexezoti.pdf
    • http://bitcoinserv.co.uk/uploads/1/3/0/7/130775649/rupofufona.pdf
    • http://staceyphillips.online/uploads/1/3/0/7/130776439/wopitejon.pdf
    • http://blackdogsocialconsultants.com/uploads/1/3/0/5/130546971/81eb7f341c948.pdf
    • http://igutyria.com/uploads/1/3/0/6/130621061/zuwikirofed-vipefudotenawo.pdf
    • http://yogaandasianbodytherapy.com/uploads/1/3/0/7/130739875/130739875.html#rectangular+to+polar+coordinates+calculator
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License
    • https://fedoraproject.org/wiki/Licensing/LiberationFontLicense

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003334.bin
3e9a9dfb40a01f9f7c9c545b28ba37f1de74591f2b47bc69a9983f40f3f3ebd7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3334 16080 bytes
font_01_sfnt_off00004796.bin
4fa858b82b445805eff69b872cfcae0b273ce6c644f001a2365b71733efe32ff		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4796 2988 bytes
font_02_sfnt_off00005549.bin
e8efb42091048696e3feaf334f216ae0bfa51b80202236c1257d007bd4b62943		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5549 9332 bytes

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