Malicious PDF — malware analysis report

Static analysis result for SHA-256 4546f1ba344850ed…

MALICIOUS

PDF

42.8 KB Created: 2020-03-16 12:45:43 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 2acae7096a432f01410326cc1c7ebc68 SHA-1: c8e453cdc8dc703da3475f2061914cf8e4a0cea4 SHA-256: 4546f1ba344850edb0b0bb514b78c58f56f42e5985d1feda9ef47685dcecc08e
96 Risk Score

Malware Insights

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

The PDF contains a large number of embedded external links, identified by the PDF_SEO_LINK_FARM heuristic. The ML classifier also strongly indicated maliciousness. The document body text, though partially obfuscated, contains a URL that appears to be part of this link farm. The primary attack pattern involves directing users to a network of potentially malicious websites.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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
  • 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://host152.carmichaelnl.com/uploads/1/3/0/4/130436154/130436154.html#report+dangerous+driving+nsw+online
    • http://office-supp.com/uploads/1/3/0/5/130590191/834abeb5a.pdf
    • http://www.bl4kstripe.com/uploads/1/3/0/6/130604133/mozokerase_fobenopawatosib_rijefagano_wepiruwarakapiv.pdf
    • http://gregasteele.com/uploads/1/3/0/8/130813818/tazukoluzuxuni-nibagurot-kitojasuno-dipojeputiru.pdf
    • http://personalizededucation.net/uploads/1/3/0/3/130313316/sijusowor.pdf
    • http://www.the-high-vibe-tribe.com/uploads/1/3/0/2/130289532/41b81707.pdf
    • http://mail.randolphhamptonfire.org/uploads/1/3/0/4/130488114/5a2bde11d14065.pdf
    • http://meubnb.com/uploads/1/3/0/6/130620438/99187b.pdf
    • http://euroatlantic-group.com/uploads/1/3/0/8/130874393/lilobazikam.pdf
    • http://webmail.maeganabel.com/uploads/1/3/0/3/130312974/5e8750e532300.pdf
    • http://sims-motors-services.com/uploads/1/3/0/4/130489706/gizonuw.pdf
    • http://crtmailingsystemllc.com/uploads/1/3/0/7/130739895/xabutisatirajasa.pdf
    • http://mta-sts.mx.ladubois.com/uploads/1/3/0/6/130621664/jotuduwowekobe_jidefukipivef.pdf
    • http://sunnyvalecoffee.com/uploads/1/3/0/3/130313783/ditewuwobetejar.pdf
    • http://thrivemarriageministry.org/uploads/1/3/0/8/130874046/a698d7d76d3b8.pdf
    • http://maxtrainerincome.com/uploads/1/3/0/5/130540814/gaxomuxaxolatuf.pdf
    • http://notquitenans.com/uploads/1/3/0/8/130815031/gelovuxunelaf.pdf
    • http://goonmud.org/uploads/1/3/0/2/130270917/149726.pdf
    • http://rogerlouis-construction.com/uploads/1/3/0/7/130776509/sidaletani.pdf
    • http://simplyoakboutique.net/uploads/1/3/0/9/130969428/a53e5591e032fa4.pdf
    • http://www.signaturehalal.us/uploads/1/3/0/2/130288380/33459f8b833.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_off00007ef2.bin
59d7da745aae1cbf5efb46f1d9b104dd3e0812572ae1d3643d094e7282aa62d4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7EF2 7824 bytes

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