Malicious PDF — malware analysis report

Static analysis result for SHA-256 0acbef12c7a22055…

MALICIOUS

PDF

70.0 KB Created: 2020-06-03 22:22:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1d89267b6e768a5f1d26f2310eac9291 SHA-1: d87be3f6fdcee4bb2c4acbc2eeba06c5ee885cca SHA-256: 0acbef12c7a22055275afe67266099f2859dbcb194208d21aa086da3b3f91400
136 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains a lure related to "New Holland workshop manuals" and exhibits characteristics of an advance-fee scam. It embeds numerous external links, with the primary ones pointing to potentially malicious content. The ML classifier strongly flagged this PDF as malicious, and the presence of multiple external links suggests an attempt to redirect the user to download further payloads or engage in fraudulent activities.

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.
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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://1cj.undesirable.us/uploads/1/3/1/6/131606480/131606480.html#new+holland+workshop+manuals
    • http://update-customer-trx005.info/uploads/1/3/1/0/131070452/8663935.pdf
    • http://mail.360church.com.au/uploads/1/3/0/9/130969483/nirojajavujivi_zunorebimu.pdf
    • http://eltacoranchero.com/uploads/1/3/0/6/130639407/4947430.pdf
    • http://costartersrva.com/uploads/1/3/0/5/130588384/4ed4cd5d2a18d.pdf
    • http://1cj.undesirable.us/uploads/1/3/1/6/131606480/terms.html
    • http://1cj.undesirable.us/uploads/1/3/1/6/131606480/dmca.html
    • http://1cj.undesirable.us/uploads/1/3/1/6/131606480/policy.html
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://zamukesokumo.files.wordpress.com/2020/06/zopowobefixuwotatevudu.pdf
    • https://mijoxumivibu248704507.files.wordpress.com/2020/06/70397468890.pdf
    • https://kuperira.files.wordpress.com/2020/06/33495297047.pdf
    • https://gunobuw.files.wordpress.com/2020/06/tixopewitagi.pdf
    • https://munamipatex.files.wordpress.com/2020/06/fovigin.pdf
    • https://susuloteteze.files.wordpress.com/2020/06/timulevijirax.pdf
    • https://xezifemubet.files.wordpress.com/2020/06/duzinavusasuwa.pdf
    • https://puladobino.files.wordpress.com/2020/06/91996118375.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_off0000e650.bin
4379705eceb10ce6243c16f72bb6feca07705d22d0c72c158b33de335bead4d6
pdf-font-stream PDF embedded font (sfnt) at offset 0xE650 11072 bytes