Malicious PDF — malware analysis report

Static analysis result for SHA-256 a2d6125e8bb8fb46…

MALICIOUS

PDF

44.9 KB Authoring application: Nitro PDF
MD5: c8bf85c2392e0a997e46d5fdb35557b8 SHA-1: c0afcfb9851fc3d803616861eaac993aa33c260b SHA-256: a2d6125e8bb8fb46f5bedbcc46bca233b27f6e3d4dcf468430bb0abe4a8bfafc
150 Risk Score

Malware Insights

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

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. No scripts were extracted from this sample, and the document body was heavily obfuscated and truncated, preventing a deeper analysis of its specific lure.

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://gwc.basaltlibrary.org/uploads/1/3/0/4/130476492/gefusa.pdf
    • http://kayleighpeddie.com/uploads/1/3/0/5/130589123/9221164.pdf
    • http://www.chickasawconnections.org/uploads/1/3/0/4/130476347/jorafolexakifu.pdf
    • http://crafttherapy.net/uploads/1/3/0/8/130873918/jamafaxuw-datuzuze-lemiratufalaral.pdf
    • http://mta-sts.tammi-kim.de/uploads/1/3/0/3/130313242/70b86.pdf
    • http://www.wake2migrate.com/uploads/1/3/0/3/130380002/nulavuferos.pdf
    • http://kelviron.co.in/uploads/1/3/0/6/130639699/0e8b76e.pdf
    • http://www.heidihackford.net/uploads/1/3/0/6/130604517/metogojatokavumun.pdf
    • http://www.campanellichoir.org/uploads/1/3/0/6/130620399/bazavebav_lazuj_rovepibigorun_tibibegovipad.pdf
    • http://robotitechnologies.com/uploads/1/3/0/5/130541209/9902459.pdf
    • http://mail.stewartvillesportsmansclub.com/uploads/1/3/0/7/130775527/5424686.pdf
    • http://melaniesfoodblog.com/uploads/1/3/0/4/130436519/wexufozowigudurub.pdf
    • http://nikaspaus.com/uploads/1/3/0/7/130739474/vovapiginida.pdf
    • http://fix-ng.com/uploads/1/3/0/8/130814290/raruxot.pdf
    • http://bnaiisraelnc.com/uploads/1/3/0/7/130776521/3296718.pdf
    • http://cornerstoneinsuranceservices.com/uploads/1/3/0/5/130543402/zoxoke.pdf
    • http://prolinelifepharmaceutical.com/uploads/1/3/0/6/130620788/pugibifelirujig_xonimijobo_sasawurafukesu_lugejikut.pdf
    • http://www.fifipheromone.com/uploads/1/3/0/3/130323762/8678781.pdf
    • http://www.oddbutterflies.com/uploads/1/3/0/3/130313087/6e844c.pdf
    • http://www.silverdragoncrystals.net/uploads/1/3/0/7/130740086/bokikub-gevidusan-wodopujifaze-tosovol.pdf
    • http://chickasawcasinos.com/uploads/1/3/0/6/130605015/wagorisatepozude.pdf
    • http://xznlz5l3.brdge.org/uploads/1/3/0/6/130639672/130639672.html#using+cpctc+with+triangle+congruence+worksheet+answers

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000033ae.bin
ebc0f33c3547a5c3cdb9ac5e07399e3015eee4509d4ebb579acecdb9806a949a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x33AE 16208 bytes
font_01_sfnt_off00004be2.bin
4f4b99f1fc807da3aa390283fc63d4ed18997ebd520d6cf16209f17fdac51e00		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4BE2 8756 bytes

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