Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ab3f883152fe705…

MALICIOUS

PDF

44.4 KB Created: 2020-03-28 10:20:05 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: df4b19c67757ee3466e686cfa424b0d3 SHA-1: e739215dac22c53a8623e8297c0f46d0dc5187ed SHA-256: 4ab3f883152fe7051081bbf4b0bcca1d52edbb41c857b7e983dc841996af569c
96 Risk Score

Malware Insights

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

This PDF document exhibits characteristics of a link farm, containing a large number of external links to various domains. The ML classifier strongly flagged this sample as malicious. The primary attack pattern involves directing users to a multitude of external URLs, likely for SEO manipulation or to serve further malicious content. No scripts were extracted from this sample.

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://sensitiveminds.org/uploads/1/3/0/4/130478009/130478009.html#juegos+de+barbie+escuela+gratis
    • http://scatterink.com/uploads/1/3/0/8/130874045/2990722.pdf
    • http://buildnewpower.com/uploads/1/3/0/3/130323146/32ffc48.pdf
    • http://mojaveoffroadadventures.com/uploads/1/3/0/4/130476263/korunibu-faxov-finat.pdf
    • http://pozitivevibrationzcreativedesignz.com/uploads/1/3/0/8/130813982/zuwuderulalusiwamo.pdf
    • http://officialentrepreneurselite.com/uploads/1/3/0/5/130550797/tumoluzuzus.pdf
    • http://www.newysmerch.com.au/uploads/1/3/0/6/130640178/e75c85495c1.pdf
    • http://www.miaveda.com/uploads/1/3/0/8/130813834/lifudoforexodujux.pdf
    • http://www.tiedyeharvest.com/uploads/1/3/0/2/130289185/8940254.pdf
    • http://lipavingmasonry.com/uploads/1/3/0/7/130776755/lejezip.pdf
    • http://stallbroker.com/uploads/1/3/0/6/130620607/7726822.pdf
    • http://www.plumislandweavingco.com/uploads/1/3/0/6/130604014/da538d2.pdf
    • http://axelle-chefprivee.fr/uploads/1/3/0/5/130590569/54e576.pdf
    • http://allgodscreation.com/uploads/1/3/0/6/130620479/kelofugarixobit.pdf
    • http://aimesif.com/uploads/1/3/0/8/130874266/junoxelusem.pdf
    • http://www.abbysrealm.com/uploads/1/3/0/8/130813931/lixesedujoma.pdf
    • http://imaginewedding.co.uk/uploads/1/3/0/7/130775242/jaresolofo_wogep_nekafelo.pdf
    • http://cmyshow.com/uploads/1/3/0/9/130969480/pirazej.pdf
    • http://forensicorientation.org/uploads/1/3/0/4/130476740/f7c15f22f6.pdf
    • http://oboeandbassooncamp.com/uploads/1/3/0/6/130621620/wogenax.pdf
    • http://vanessanysten.com/uploads/1/3/0/5/130539059/dirodekojobug.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_off00008383.bin
4a1e3c5e8a2551fbf7975bf4684e2e6d8062fdb22c50b336e91ff21a1af13659		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8383 8688 bytes

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