Malicious PDF — malware analysis report

Static analysis result for SHA-256 09133393cce636a0…

MALICIOUS

PDF

30.4 KB Created: 2020-06-05 20:22:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dad5fe89cb3d8067f0ec53d9646f04f7 SHA-1: cd25340899f04df9b1ef056577c591c667f1b21b SHA-256: 09133393cce636a09e5ed038ead6211a713cb815853981d68ba91241c680e51a
156 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ML classifiers and ClamAV, specifically as a dropper. It contains a large number of external links, suggesting it functions as a link farm. These links likely lead to further malicious content or phishing sites, aiming to trick users into downloading additional payloads or revealing sensitive information.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 5

  • 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.Dropper.Agent-9212796-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Dropper.Agent-9212796-0
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://hersandhers.org/uploads/1/3/1/6/131606992/131606992.html#mathematical+thinking+problem+solving+and+proofs+pdf
    • http://cpanel.thetownturkey.com/uploads/1/3/0/6/130639521/xekomek.pdf
    • http://skookumchuckpublishing.com/uploads/1/3/0/4/130435898/xifuforebored.pdf
    • http://divinebeingaustralia.com/uploads/1/3/0/5/130590475/voxegoxuj.pdf
    • http://agoraadvisors.com/uploads/1/3/0/4/130483050/4834595.pdf
    • http://cpanel.farmgirlboutique.com/uploads/1/3/0/2/130287898/528e0b.pdf
    • http://mta-sts.mail.bodychicfashion.com/uploads/1/3/1/4/131408062/506372.pdf
    • http://coachingreimagined.com/uploads/1/3/1/4/131453005/davoripu-vajupibojipiga-sojiludi-rabefewig.pdf
    • http://doziepr.com/uploads/1/3/0/5/130551086/5a122948.pdf
    • http://cpcontacts.elegantmusic.ca/uploads/1/3/0/4/130475980/sedarameku.pdf
    • http://brandonandmichele.blog/uploads/1/3/1/3/131382607/tewod.pdf
    • http://intuitiveinvest.com/uploads/1/3/1/3/131397930/1630807.pdf
    • http://mylocalcbdstores.com/uploads/1/3/0/3/130313237/xigifige_vawezibem_pesosovegivo_miruxujubub.pdf
    • http://jmichaelconstruction.com/uploads/1/3/0/4/130483275/menitufadiw.pdf
    • http://hersandhers.org/uploads/1/3/1/6/131606992/terms.html
    • http://hersandhers.org/uploads/1/3/1/6/131606992/dmca.html
    • http://hersandhers.org/uploads/1/3/1/6/131606992/policy.html
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://desimexim.files.wordpress.com/2020/06/motosumi.pdf
    • https://juwizow.files.wordpress.com/2020/06/jujajunik.pdf
    • https://dazorabe.files.wordpress.com/2020/06/38494081297.pdf
    • https://litojaf.files.wordpress.com/2020/06/26372982170.pdf
    • https://vodefewosiru.files.wordpress.com/2020/06/wekevokogiliratogez.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005053.bin
1b3776401e063d4374dacc81ee9859ea756e62d8b4cf5696cb7c37d4cb5b8dca		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5053 8516 bytes

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