Malicious PDF — malware analysis report

Static analysis result for SHA-256 87ea9f38b1ee5e22…

MALICIOUS

PDF

36.5 KB Authoring application: PDFBox
MD5: e410785830b15335c3029a832d62d0fa SHA-1: db430bd7546f00a00d5883899f72d62b7bfbbc63 SHA-256: 87ea9f38b1ee5e2204a151d0850efc51a4f1c530338c771520f6e5e8bc3cc2f0
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded URLs pointing to other PDF files, a technique often used for SEO poisoning or to distribute malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent. No scripts were extracted from this sample, but the sheer volume of external links suggests a distribution or redirection mechanism.

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://nckphotography.com/uploads/1/3/0/6/130604458/d7a08f11122d3e.pdf
    • http://metconengineering.ca/uploads/1/3/0/4/130483184/64404178.pdf
    • http://mountainofgod.org/uploads/1/3/0/5/130541103/vurutozuj_ledas_datilanosugok.pdf
    • http://naturecalling.us/uploads/1/3/0/6/130604876/3954d5c6f2.pdf
    • http://royleighton.com/uploads/1/3/0/6/130620828/wewuva.pdf
    • http://keeganvanmaanen.com/uploads/1/3/0/5/130589396/xukakeporexaz-kadireponukexa-rubapipix.pdf
    • http://dandglettings.com/uploads/1/3/0/7/130739956/fubagitilapo_konirolururobiz_lipedonuzuxap_zudozemoxubep.pdf
    • http://www.cihas.org/uploads/1/3/0/7/130776150/73724aaa70eea83.pdf
    • http://calljasonmyers.com/uploads/1/3/0/5/130589281/puxofizat.pdf
    • http://silkroadsourcing.co/uploads/1/3/0/7/130740001/kalazafabubibulutuw.pdf
    • http://merlotagency.com/uploads/1/3/0/3/130313114/duxutaf_bovupepemo_tizudo.pdf
    • http://www.richmondgroup.org/uploads/1/3/0/7/130775521/d50b965c7ae70.pdf
    • http://artofyiannipasamihalis.com/uploads/1/3/0/6/130639883/lapurulajetogu.pdf
    • http://modish716.com/uploads/1/3/0/4/130476098/3084629.pdf
    • http://www.mollylizzio.com/uploads/1/3/0/4/130477309/92f7a4cd402.pdf
    • http://toptreeservicerosevilleca.com/uploads/1/3/0/3/130313324/527692.pdf
    • http://castawaycustomsmidwest.com/uploads/1/3/0/3/130313037/lanewisevub.pdf
    • http://feriadeinternet.com/uploads/1/3/0/8/130814559/tujavedalabiw-xomub.pdf
    • http://lucidpapercuts.com/uploads/1/3/0/6/130639495/a5763bafb61c.pdf
    • http://montanapurewood.com/uploads/1/3/0/6/130639943/130639943.html#valve+tray+distillation+column+design

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000312b.bin
9bfde241808a4f0a1d83efa94bfa028470586fa2e3a28e7ed92f5856e7f2b0e4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x312B 7412 bytes

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