Malicious PDF — malware analysis report

Static analysis result for SHA-256 974c4014562d7467…

MALICIOUS

PDF

76.7 KB Created: 2021-05-26 07:55:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 917728fec89ceeccc51bc37af53b2aef SHA-1: ee8a1ef3264ea9956f70dd7b885dd8b8ebf8bb1e SHA-256: 974c4014562d7467f362e49105abfac5a433d49b6289d3225b0c32f82ca1fe7a
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, a common tactic for SEO link farms and phishing lures, as indicated by the 'PDF_SEO_LINK_FARM' heuristic. The 'ML_NYX_PDF_MALICIOUS' and 'CLAMAV_DETECTION' heuristics, along with the presence of an external URI pointing to a suspicious domain, strongly suggest malicious intent. The document body, though partially corrupted, suggests a lure related to educational material to entice downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://kuzutuzo.ru/strik?utm_term=essential+university+physics+volume+1+3rd+edition+pdf+download PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4424024/normal_5fcd3d3a43cde.pdfIn PDF document text
    • https://bokupotanija.weebly.com/uploads/1/3/5/9/135995636/74ac87ab9f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401558/normal_6041e4520773c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482399/normal_6033db7a8b3db.pdfIn PDF document text
    • https://vowabogebem.weebly.com/uploads/1/3/0/7/130775978/sisedagomajo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489734/normal_5fdffcc54fda0.pdfIn PDF document text
    • https://viwoxinuzozaxa.weebly.com/uploads/1/3/1/6/131636825/4563486.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/2a853687-4795-4f62-bc46-de47c7056a67/because_of_winn_dixie_multiple_choice_test.pdfIn PDF document text
    • https://s3.amazonaws.com/rodakarugupoko/samsung_galaxy_3_tablet_manual_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2f5bf96f-0785-4d26-9bf3-1586e4b2b98c/litok.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3f39b3cd-2777-4c7a-b4b4-feada8ad8d9e/what_is_metaphysics_according_to_heidegger.pdfIn PDF document text
    • https://s3.amazonaws.com/lorerexeg/consumer_journey_template.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6a0546aa-32ed-4fcf-adff-1eae78b75111/fozifixevinol.pdfIn PDF document text
    • https://s3.amazonaws.com/lakadutof/four_kings_casino_and_slots_trophy_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/legesiliv/linen_cotton_blend_sheets.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dd9a5d83-063f-489b-83bf-a1f1afc17ef8/85204709681.pdfIn PDF document text
    • https://s3.amazonaws.com/vavejijitatofu/inner_join_vs_cartesian_product_performance.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5809efa0-1bcb-4765-8d2a-d7955b3ac151/how_do_i_fix_the_flashing_light_on_my_kitchenaid_blender.pdfIn PDF document text
    • https://s3.amazonaws.com/gizonukorad/shaggy_boombastic_mp4.pdfIn PDF document text
    • https://s3.amazonaws.com/kobivimelelo/xetetoxovaramexomituwub.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c14faef3-09ac-4337-a23f-f447565cc89f/saputowom.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fa6f6e37-efb1-44f7-9d95-59d0d8dbed03/fukuwexefuzezubegeniwom.pdfIn PDF document text
    • https://s3.amazonaws.com/ruzaganog/52493235345.pdfIn PDF document text
    • https://s3.amazonaws.com/fajetufekejo/61920724352.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dd8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD8A 3828 bytes
SHA-256: 2e6675fd6ec1ca8a8162ac9d34369a08312a2d89e5e4ff28f71bd204b3a89cf1
font_01_sfnt_off0000eb24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB24 5820 bytes
SHA-256: 98201e58c954339f4f09f84e3b8bede5f03dbca73d4cc017fb110e855952a218
font_02_sfnt_off0000feef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEEF 10308 bytes
SHA-256: 60d164449135ddac8b1ca468a766c27dd94925b7a93fe2774e8adb628924d811