Malicious PDF — malware analysis report

Static analysis result for SHA-256 a13b7c0230e76a0a…

MALICIOUS

PDF

39.3 KB Authoring application: OpenOffice.org
MD5: c278b75e922c0b2bfd415d382e23f120 SHA-1: 5145297a42665495c94e3430481cee06c8f6925e SHA-256: a13b7c0230e76a0affacdf691b9370221de2448ac1df3b2ae8e50ea2fbf7083e
150 Risk Score

Malware Insights

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

The PDF_SEO_LINK_FARM heuristic indicates the presence of 31 external PDF links, with the dominant host being www.bcsgrubbox.com. This suggests a link farm or redirection tactic. The ML classifier and ClamAV detection strongly support a malicious classification. No scripts were extracted, and the document body content is largely unreadable binary data, making it difficult to determine a specific user-facing lure.

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.bcsgrubbox.com/uploads/1/3/0/5/130539612/jurujadejubosanegef.pdf
    • http://willowwolffurnishings.com/uploads/1/3/0/7/130776277/boveruxuri-gonasaj.pdf
    • http://sunnybottom.com/uploads/1/3/0/2/130288729/gepuzegovut.pdf
    • http://bearsvsbabies.org/uploads/1/3/0/6/130605080/9605319.pdf
    • http://ras.local.stockmi.com/uploads/1/3/0/6/130621322/delagi-nomegoruko.pdf
    • http://imaginarymonsters.net/uploads/1/3/0/6/130621272/9793557.pdf
    • http://north-shore-aerial-imaging.com/uploads/1/3/0/6/130604098/rovogodewesuwa-takixo.pdf
    • http://anofasonline.com/uploads/1/3/0/4/130435743/4733110.pdf
    • http://boylepublichealth.com/uploads/1/3/0/5/130551186/denalakalaxipitiwi.pdf
    • http://www.theyogaden.net/uploads/1/3/0/4/130492963/a10f3343cc.pdf
    • http://chadallers.com/uploads/1/3/0/5/130589057/begefa.pdf
    • http://calaveraswines.org/uploads/1/3/0/4/130477252/mesudubozapufexesux.pdf
    • http://nordcel.com/uploads/1/3/0/2/130270900/198187.pdf
    • http://essentialmatters.com/uploads/1/3/0/7/130739346/147060c878.pdf
    • http://plantandsoiltreatment.com/uploads/1/3/0/6/130621545/5362712.pdf
    • http://beachumbrellarental.com/uploads/1/3/0/6/130621349/18850.pdf
    • http://steeltec.us/uploads/1/3/0/3/130379181/gutakirejaxiv_topabag_rimax_limelaw.pdf
    • http://www.mangobeach.biz/uploads/1/3/0/3/130313242/wamutivagosam-ranomalenovop.pdf
    • http://montessori-lomas.com/uploads/1/3/0/4/130476370/keriburopawolu.pdf
    • http://onitscore.com/uploads/1/3/0/4/130488861/2050242.pdf
    • http://www.chantrymodelboatclub.co.uk/uploads/1/3/0/3/130313098/3306679.pdf
    • http://bienchulitos.com/uploads/1/3/0/3/130313111/41caa5a769e787.pdf
    • http://miseniorcenters.com/uploads/1/3/0/6/130639856/a2799.pdf
    • http://playhousewestartsfoundation.org/uploads/1/3/0/6/130604525/kozuwir_tanapibon_vopopab.pdf
    • http://c0171196xstreamtravel.xsideas.com/uploads/1/3/0/2/130288639/130288639.html#os+x+preview+combine+images+into+pdf
    • http://imaginarymonsters.net/uploads/1/3/0/6/130621272/9793557

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003678.bin
0e93f0a0482daa571ede3fbffc9b75f097f6a965343dec87cad2cd0b299e6885		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3678 7864 bytes

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