Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d754ab4ec08ba74…

MALICIOUS

PDF

46.7 KB Authoring application: Pdftk
MD5: ea1fc0b390108be51b2d266c2bcfea0f SHA-1: 140e3661618fc342efbfd4d1b7cb6276afff27f5 SHA-256: 3d754ab4ec08ba74647ffe119fb3a63886b2065d74ba540896fce25e21ec9d52
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a large number of embedded links to external PDF files hosted on various domains, as indicated by the PDF_SEO_LINK_FARM heuristic. This suggests a link farm or distribution mechanism for malicious content. The ClamAV detection and ML classifier further support its malicious nature. No scripts were extracted, and the document body was truncated, limiting further analysis of specific user-facing lures.

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://deadguyprom.com/uploads/1/3/0/8/130814531/mamuvofew_gizapom.pdf
    • http://deottoalberto.com/uploads/1/3/0/3/130313649/limogosedadupo_sujufufes_paposixi.pdf
    • http://desatascosgava.net/uploads/1/3/0/7/130776341/97395a.pdf
    • http://evernightmoon.com/uploads/1/3/0/6/130621597/xexusibiwosip_zojen.pdf
    • http://peekingpress.net/uploads/1/3/0/5/130538946/0b9cd73673c80.pdf
    • http://www.hoonehooldus.com/uploads/1/3/0/8/130814014/3518705.pdf
    • http://www.youringenuitees.com/uploads/1/3/0/5/130542894/forunodabetid_gafiwowagubid_kegale.pdf
    • http://www.harcywraps.com/uploads/1/3/0/8/130813658/sajovosefel.pdf
    • http://nilssoncontracting.com/uploads/1/3/0/6/130639036/93413d.pdf
    • http://pvcare.org/uploads/1/3/0/4/130476908/2113916.pdf
    • http://matthewodempsey.com/uploads/1/3/0/7/130739029/7782d448.pdf
    • http://dafaaomenwangshangbaijiale.br3h.com/uploads/1/3/0/8/130813317/b8cb77107.pdf
    • http://royalsingalongparties.com/uploads/1/3/0/6/130621351/fifuvubomemu_wujifive.pdf
    • http://www.bethelovefoundation.com/uploads/1/3/0/5/130590456/2013649.pdf
    • http://eveil-universel.fr/uploads/1/3/0/2/130272420/vufagajuxofat.pdf
    • http://www.failytale.com/uploads/1/3/0/6/130620937/rinom.pdf
    • http://bluffcreekfarmsbedandbreakfast.com/uploads/1/3/0/4/130483939/zewutemitun.pdf
    • http://renditnow.com/uploads/1/3/0/7/130775772/130775772.html#factoring+by+grouping+worksheet+algebra+1+answers

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000557e.bin
7dbdd0673ad1e7f66678ebf696691e42140bb544c364c7e93fd93b56beb424a9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x557E 9644 bytes

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