Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce459e458ed3d479…

MALICIOUS

PDF

49.5 KB Created: 2020-04-02 03:42:01 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 22fc89b59f74cea2bf8d2d5de46a3cd7 SHA-1: fea91e01915854ddda3fd0d129ca6ba70174f81c SHA-256: ce459e458ed3d479ffb689398a9c02acee99bdd2418377bb0f4a34c691e8a732
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, embedding a large number of external URLs. The heuristic 'PDF_SEO_LINK_FARM' specifically flags this behavior, indicating a potential attempt to manipulate search engine results or redirect users to malicious content. The ML classifier also strongly supports a malicious verdict. No scripts were extracted from this sample, but the extensive list of embedded URLs suggests a primary function of directing users to potentially harmful external resources.

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://universeoftoronto.com/uploads/1/3/1/4/131437683/131437683.html#aquella+orilla+nuestra+rese%C3%B1a
    • http://ophsclassof1999.com/uploads/1/3/0/6/130621124/4191aa55c.pdf
    • http://chinesephoenixarts.com/uploads/1/3/0/7/130775071/e1916b6393f00.pdf
    • http://fcs.scot/uploads/1/3/0/2/130274256/5ea24.pdf
    • http://kite-klinik.com/uploads/1/3/1/0/131070993/bilojujumunadoj.pdf
    • http://impactgoalie.com/uploads/1/3/0/5/130551782/7622486.pdf
    • http://haam.info/uploads/1/3/0/7/130775920/weloresotipe.pdf
    • http://riodelsolinn.com/uploads/1/3/1/0/131069824/jakagu-folikuduvozuzub-vupizunasik.pdf
    • http://awarenessforthebetter.net/uploads/1/3/0/2/130271207/mojibusezi.pdf
    • http://endemicaco.com/uploads/1/3/0/9/130969854/0192ab8b.pdf
    • http://furnitureimportexportinc.com/uploads/1/3/0/8/130814225/e3f4183749a30.pdf
    • http://td3homeimprovements.com/uploads/1/3/1/4/131408620/korididu-rololipupa-fisaguzovadakan-separitisi.pdf
    • http://giayphepvsattp.com/uploads/1/3/0/5/130539049/1404877.pdf
    • http://globalgroupmgt.com/uploads/1/3/0/5/130552097/e0f08d7d8.pdf
    • http://genealogisttoolbox.com/uploads/1/3/0/4/130488583/6775271.pdf
    • http://azstrut.us/uploads/1/3/0/4/130477201/d77af83dd27ef3.pdf
    • http://dougpickeringfurniture.com/uploads/1/3/0/3/130313728/pumiforezawujofit.pdf
    • http://collettemandolino.com/uploads/1/3/0/4/130476385/4ffb014.pdf
    • http://officespaceinmarietta.com/uploads/1/3/0/4/130476896/vemonotu.pdf
    • http://blythenotables.com/uploads/1/3/0/5/130550783/db4f6f3a6f.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007dca.bin
b1f8bfa5f902b66b128f1756c94a686e9527c54568a84832bb3dfbd42de9344d
pdf-font-stream PDF embedded font (sfnt) at offset 0x7DCA 10100 bytes
font_01_sfnt_off0000a1a5.bin
779aa567746046747dac965df7fdfb06ff632674a0a99ce247a327bf89f0fa63
pdf-font-stream PDF embedded font (sfnt) at offset 0xA1A5 16036 bytes