Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed6bccecf8b26e10…

MALICIOUS

PDF

41.0 KB Created: 2020-04-02 23:21:54 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: e754b0f642652693972062f07a79683e SHA-1: 8897e0b5089982a85b7a2f48b335c80d0f2c3586 SHA-256: ed6bccecf8b26e10749c6a6a863130b3d82e84a1ee50d1bcdcefeab28dced04e
96 Risk Score

Malware Insights

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

The PDF contains a large number of external links to other PDF files hosted on various domains, a technique often used for SEO poisoning or to distribute malware. The ML classifier strongly indicated maliciousness. No scripts were extracted, but the sheer volume of outbound links suggests a malicious intent to redirect the user to potentially harmful content.

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://faroutrocketry.space/uploads/1/3/0/4/130435835/130435835.html#chinese+new+year+craft+ideas
    • http://varianides.com/uploads/1/3/0/5/130546742/fe94b1ddb7f2b7c.pdf
    • http://meganwesterveltfloraldesign.com/uploads/1/3/1/3/131380594/6756554.pdf
    • http://apservices.london/uploads/1/3/0/8/130874086/rutotelomuke.pdf
    • http://mellifluousencapsulation.com/uploads/1/3/0/3/130323566/gunawif.pdf
    • http://scprobatelawfirm.com/uploads/1/3/0/6/130639489/fc1c4.pdf
    • http://nurturingnursery.com/uploads/1/3/0/7/130775516/bozevazivekilag_gegojunotazi_tinuroromo_vaxilutilitaz.pdf
    • http://reconnectate.com/uploads/1/3/0/5/130540155/9283f1b91bee.pdf
    • http://restorationridesllc.com/uploads/1/3/1/3/131398358/kufiwopu_zibebejateg_fiduvesizoden_migadonaf.pdf
    • http://crafterafterhours.com/uploads/1/3/0/4/130483520/98414abf8add10.pdf
    • http://amyrasplicka.com/uploads/1/3/0/3/130323445/0380d.pdf
    • http://enormecontrol.com/uploads/1/3/0/7/130775280/dizekutetarabif.pdf
    • http://newanday.host/uploads/1/3/0/6/130640150/9c813797.pdf
    • http://qhrcquintessentialhrconsultants.com/uploads/1/3/1/3/131382590/jurokuwojoto.pdf
    • http://facetofacepolebat.com/uploads/1/3/0/6/130639348/ce0eeb5030801.pdf
    • http://4charities.ca/uploads/1/3/0/2/130288710/d24d9694.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_off00007749.bin
3711dad957bc8dc17705ccb5972ca18c55b121e142e20be58c2f70c8f5bf54a1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7749 8184 bytes

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