Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee2cc8328c3a6092…

MALICIOUS

PDF

53.4 KB Created: 2020-03-16 03:05:44 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-15
MD5: 4057ebb629b6ca91f771d2363e1548cb SHA-1: 30b709ae268f7ccb4042d5b185b5a91a8ac017a1 SHA-256: ee2cc8328c3a609250848d3d03670a70a03f3488560cc8eecaa16491ef8fb1c0
96 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded URLs, indicating a link farm or SEO manipulation tactic. The heuristic 'PDF_SEO_LINK_FARM' specifically flags this behavior, suggesting the document's primary purpose is to redirect users to numerous external sites. No scripts were extracted, and the document body is heavily obfuscated, making it difficult to determine a more specific attack pattern beyond the link redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://machoco.com/uploads/1/3/1/0/131070940/131070940.html#cardinal+dan+ordinal+number+pdf PDF link annotation
    • http://surgicalwebcasting.com/uploads/1/3/0/7/130775971/6310799.pdfIn PDF document text
    • http://walk-cards.com/uploads/1/3/0/3/130313686/sodefisiwusasutawon.pdfIn PDF document text
    • http://freecryptogamesandapps.com/uploads/1/3/0/9/130969751/jekejerimor-xedositarez-nakiloz-kozerixi.pdfIn PDF document text
    • http://flatlinermusic.com/uploads/1/3/0/2/130271211/tivivegowu.pdfIn PDF document text
    • http://www.luna-lioness.com/uploads/1/3/0/4/130488241/2841477.pdfIn PDF document text
    • http://share-genki.com/uploads/1/3/0/5/130539432/guzedasiribizeg.pdfIn PDF document text
    • http://74-123-79-13.mgwnet.com/uploads/1/3/0/5/130550736/1176ae.pdfIn PDF document text
    • http://www.kathrynspetgrooming.com/uploads/1/3/0/9/130969411/3f529ada42d5.pdfIn PDF document text
    • http://www.jacobsonbookkeepingsolutions.com/uploads/1/3/1/0/131070733/980b0373eb.pdfIn PDF document text
    • http://tim-fitz.com/uploads/1/3/0/7/130739069/vifosotalari_lofivonu_jalozewipak_dobapuwava.pdfIn PDF document text
    • http://kreativefinephotography.com/uploads/1/3/0/6/130621304/pedixa_dimixezaxiwil_rivuteruzabix.pdfIn PDF document text
    • http://getmedeal.com/uploads/1/3/0/2/130272360/pivijotalowoz-kotuxar-vufezuge-vamib.pdfIn PDF document text
    • http://www.two-ljcleaningservices.com.au/uploads/1/3/0/6/130621928/rolajuvawoviwudolowu.pdfIn PDF document text
    • http://wristart48.com/uploads/1/3/0/7/130775800/ramipezes.pdfIn PDF document text
    • http://webmail.camarillochamber.org/uploads/1/3/0/4/130476736/tewalek-kixoto-jisurasoxawirel.pdfIn PDF document text
    • http://karate.westside-church.com/uploads/1/3/0/2/130270808/2446805.pdfIn PDF document text
    • http://mail.mcalearmanagement.com/uploads/1/3/0/8/130874237/guwen.pdfIn PDF document text
    • http://www.linkerconsultinggroup.com/uploads/1/3/0/5/130588923/danojakulekow-wosopameka-lajuzaruvos-nigew.pdfIn PDF document text
    • http://miissb.org/uploads/1/3/0/6/130605383/9447374.pdfIn PDF document text
    • http://downfortheride.com/uploads/1/3/0/5/130539095/fbefab.pdfIn PDF document text
    • http://square.janesteahouse.com/uploads/1/3/0/8/130813401/xepibugude.pdfIn PDF document text
    • http://www.cumbriachoralinitiative.org/uploads/1/3/0/5/130539114/jexojadafojule-pabidugomoveze-dodapin.pdfIn PDF document text
    • http://virgilconsultingandmentalhealth.com/uploads/1/3/0/4/130475925/vapogusuxevoja.pdfIn PDF document text
    • http://ladyandthegeek.com/uploads/1/3/0/8/130874063/5939811.pdfIn PDF document text
    • http://stauffercreations.com/uploads/1/3/0/5/130589328/fovijuvariwebi-solonifegilelut-puxofe.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • https://fedoraproject.org/wiki/Licensing/LiberationFontLicenseIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000084fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x84FB 8552 bytes
SHA-256: 982eee345802d6548112c5c098cfb5145e894c435fb9f0d834412e5b057917f5
font_01_sfnt_off0000a5dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA5DD 2652 bytes
SHA-256: e2f1373bf3d70a40ff4276a486f0a1d2d32154e4f45ad1243a44c3d3b7d91cea
font_02_sfnt_off0000af46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAF46 16636 bytes
SHA-256: 4f9609b94561c033bd99b8a11ca6a79ccddbbb42d97128bedaa937b3c4996575