Malicious PDF — malware analysis report

Static analysis result for SHA-256 16cd08684b922be1…

MALICIOUS

PDF

45.6 KB Created: 2020-04-12 07:22:34 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: ab973e3b938e9615db39500c4ff8c484 SHA-1: 807bcd5fc3f67340ce5d08d6ab85b9110a142ed0 SHA-256: 16cd08684b922be1df7d42d6640f1d55a1c99e6ce8ace933af73706894c3bc67
96 Risk Score

Malware Insights

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

The PDF contains a heuristic indicating it is a link farm, with numerous external URLs embedded within its content. The document body, though partially obfuscated, contains text related to a genealogical tree, likely serving as a lure. The primary function appears to be redirecting users to malicious websites, as evidenced by the PDF_SEO_LINK_FARM heuristic and the numerous extracted URLs.

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://brandstormpromotions.net/uploads/1/3/0/5/130590243/130590243.html#arbol+genealogico+de+adan+a+jesus
    • http://childsupervisedvisit.com/uploads/1/3/0/4/130483429/pijadexevuruw.pdf
    • http://morningstarworship.org/uploads/1/3/0/5/130550887/bolodatutumawe_talofow_nukag.pdf
    • http://transformingliveschurch.org/uploads/1/3/1/4/131482999/5828425.pdf
    • http://fingerlakestreeservice.com/uploads/1/3/1/4/131407395/zumebunogez.pdf
    • http://tahliajfitness.com/uploads/1/3/0/7/130775519/rapowevotabuvamexom.pdf
    • http://socalecoblasting.com/uploads/1/3/0/4/130476709/zogevafitimo.pdf
    • http://jenjacobsarchiving.com/uploads/1/3/0/6/130622092/texutikas.pdf
    • http://kbphotographs.net/uploads/1/3/1/4/131483305/kujutidifujizukoku.pdf
    • http://chloeskidmore.com/uploads/1/3/0/7/130775085/e9bf1b6e.pdf
    • http://leapinggnomeband.com/uploads/1/3/1/4/131406507/jugedamit_ditelisufazafo_punutikemofok_vizulem.pdf
    • http://2dom.us/uploads/1/3/0/4/130483769/1370005.pdf
    • http://kasiawolyn.com/uploads/1/3/0/3/130323888/libituti.pdf
    • http://pilotprojects.net/uploads/1/3/0/3/130323255/repasakenizewupegu.pdf
    • http://genesis126construction.net/uploads/1/3/0/5/130590374/4440863.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • 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/
    • https://fedoraproject.org/wiki/Licensing/LiberationFontLicense
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000667e.bin
020e48934690ee6a5d5d66f780e524d3609641f080d550a78f02be71c4bce0e7
pdf-font-stream PDF embedded font (sfnt) at offset 0x667E 9596 bytes
font_01_sfnt_off00008946.bin
e91619dfd4c72a85464d95ef1ba4e67df13020651c42071bafbe521a61d9f7fc
pdf-font-stream PDF embedded font (sfnt) at offset 0x8946 2652 bytes
font_02_sfnt_off000092ac.bin
779aa567746046747dac965df7fdfb06ff632674a0a99ce247a327bf89f0fa63
pdf-font-stream PDF embedded font (sfnt) at offset 0x92AC 16036 bytes