Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf47f03afb3f3b4f…

MALICIOUS

PDF

39.6 KB Created: 2020-11-08 12:42:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 9a7bc9ecf5f9bbb144f1aca0f83d3f5e SHA-1: 9c905366b713a534a2f811e4fb05f9aa55adf4f3 SHA-256: cf47f03afb3f3b4f459e76421f38983f298964fcacf2e3834ffe450d61522d08
96 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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 https://traffset.ru/123?keyword=unblocked+games+plazma+burst+2 PDF link annotation
    • https://jamuseramomuf.weebly.com/uploads/1/3/1/8/131871426/8819529.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366987/normal_5f8892db36a67.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/waxapoz/apprendre_l_anglais_seul.pdfIn PDF document text
    • https://s3.amazonaws.com/jarawaxanivu/teenage_life_in_the_50s_and_60s.pdfIn PDF document text
    • https://s3.amazonaws.com/gafedupeba/oceanic_veo_2.0_manual.pdfIn PDF document text
    • https://manetomimexa.files.wordpress.com/2020/11/lugotorizereziwatogukomak.pdfIn PDF document text
    • https://s3.amazonaws.com/xovekolamoxe/koxarusitezasu.pdfIn PDF document text
    • https://negolakone.files.wordpress.com/2020/11/52969316912.pdfIn PDF document text
    • https://s3.amazonaws.com/vutame/wizezitemaxufezelav.pdfIn PDF document text
    • https://s3.amazonaws.com/xefejevife/13066325232.pdfIn PDF document text
    • https://kitobus.files.wordpress.com/2020/11/cicala_e_formica_fiaba.pdfIn PDF document text
    • https://nisonotapuf.files.wordpress.com/2020/11/shadowrun_dragonfall_essence.pdfIn PDF document text
    • https://dilopipo.files.wordpress.com/2020/11/demetivudaxakoleze.pdfIn PDF document text
    • https://fazojikimugu656942302.files.wordpress.com/2020/11/beetalk_apk_ios.pdfIn 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
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005a30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5A30 5768 bytes
SHA-256: 02ce818b5cf4ae7b5f78d9ccec3af2879343ebc5c7b97dd87fa2ea2cafcb8c36
font_01_sfnt_off00006dc8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6DC8 10360 bytes
SHA-256: 97a8c69dbdd77c1d546faa6b6519a633b85b8d69c5ae44d4d22eed2d0fd01e9d