Malicious PDF — malware analysis report

Static analysis result for SHA-256 5521c2dcf69b8b1f…

MALICIOUS

PDF

38.2 KB Created: 2020-06-04 00:29:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9f5f90bde5ac66d0d8ca5301015cf5aa SHA-1: e1a87c3a4186c206060e9e59fba16b26edfb6c80 SHA-256: 5521c2dcf69b8b1f46c3f56c09fc79f86c618eb982a97d5f4e8437a035d5fbaa
92 Risk Score

Malware Insights

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

The PDF contains a large number of external links to other PDF files hosted on various domains, indicative of a link farm or redirection scheme. The ML classifier strongly flagged this PDF as malicious. The primary attack pattern involves leveraging these numerous external links to potentially distribute further malicious content or redirect users to phishing sites. No scripts were extracted, limiting the analysis of direct payload execution.

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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://orraasta.com/uploads/1/3/0/5/130588426/130588426.html#meek+mill+the+difference+download
    • http://investorservices.eu/uploads/1/3/0/2/130271126/dbdd271387.pdf
    • http://katielairdblogging.com/uploads/1/3/0/6/130605335/nosofapiwusuropan.pdf
    • http://aranmurray.com/uploads/1/3/0/5/130588426/fitasufiz.pdf
    • http://webmail.rusticcandlecompany.com/uploads/1/3/0/7/130738789/remedetex_rewezun_noripunilil_debixujibaxali.pdf
    • http://y1consulting.com/uploads/1/3/1/6/131606197/ruwofigiziwapu.pdf
    • http://mail.corwels.org/uploads/1/3/1/4/131438143/11c199475f.pdf
    • http://letrealtyllc.com/uploads/1/3/0/2/130289335/xogafowonositukokan.pdf
    • http://cookbookforpregnantmoms.club/uploads/1/3/0/2/130272094/mopenuxapibelix.pdf
    • http://watchempilots.com/uploads/1/3/0/2/130289424/4016061.pdf
    • http://hostmaster.talesfromfroglane.com/uploads/1/3/1/3/131379384/f2868ff4.pdf
    • http://mta-sts.mail-old.sicog.org/uploads/1/3/1/3/131398268/xadem_wirulazi.pdf
    • http://bietherapy.com/uploads/1/3/0/6/130621055/8142483.pdf
    • http://mommypoopypants.com/uploads/1/3/0/7/130775033/7126824.pdf
    • http://orraasta.com/uploads/1/3/0/5/130588426/terms.html
    • http://orraasta.com/uploads/1/3/0/5/130588426/dmca.html
    • http://orraasta.com/uploads/1/3/0/5/130588426/policy.html
    • http://bietherapy.com/uploads
    • https://fumogorid.files.wordpress.com/2020/06/50729511602.pdf
    • https://netigosod285927460.files.wordpress.com/2020/06/jidifajufugakoninemivi.pdf
    • https://liletaku.files.wordpress.com/2020/06/wojowabofagodenejavi.pdf
    • https://ribajurave604526662.files.wordpress.com/2020/06/jusinotavirowuserapekasux.pdf
    • https://tirafeb.files.wordpress.com/2020/06/42669694179.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000654d.bin
72d15e8906507043283a186cec1b5b42c9e852f3757247b895774befcff7a136		 pdf-font-stream PDF embedded font (sfnt) at offset 0x654D 11408 bytes

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