Malicious PDF — malware analysis report

Static analysis result for SHA-256 a10ef9c99c292fb5…

MALICIOUS

PDF

67.7 KB Created: 2021-03-05 08:32:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: e68de951db17644af4e7eb5b33730200 SHA-1: a2638adef2af97852ef1cce180a3938b1708c097 SHA-256: a10ef9c99c292fb5616cf243dbf7e535a2ad3a477540c4465931628249e0dc3c
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://vilenefex.ru/award?keyword=go+tell+it+on+the+mountain+chords+in+g+pdf PDF link annotation
    • https://cdn.sqhk.co/sesijisova/c3sIjey/3758911885.pdfIn PDF document text
    • http://lifopemavuju.22web.org/how_much_oil_do_i_put_in_my_craftsman_snowblower.pdfIn PDF document text
    • https://cdn.sqhk.co/mibupufek/jcjiX3K/99705024760.pdfIn PDF document text
    • https://cdn.sqhk.co/xibumediw/hbuiihi/wuzijefiwiteboz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404105/normal_6021bdbaf1ba5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4480148/normal_5fc93f52b898b.pdfIn PDF document text
    • https://cdn.sqhk.co/vifutetax/gfjeo4A/dead_trigger_zombie_shooter_mod_apk.pdfIn PDF document text
    • http://dudipoviju.22web.org/jokisawaxadijelavik.pdfIn PDF document text
    • https://cdn.sqhk.co/tedigedubemi/L3Tjdjg/monster_high_hair_salon_and_dress_up_games.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367643/normal_603420934744c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4373527/normal_5feef25215147.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/60701342-8917-4ca1-b2d0-8e76842b907a/marketing_management_class_12_mcq.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d5a2b4ca-641d-4eb8-b3a5-fa22e81e8f3f/what_oil_goes_in_110cc_pit_bike.pdfIn PDF document text
    • http://megegadimopef.rf.gd/serie_el_nombre_del_viento_actores.pdfIn PDF document text
    • https://45e41439-46a4-4c97-84f0-155cfeda4cef.filesusr.com/ugd/9d7ad9_c8331b5437464099b86a9ea08a184c24.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/489bf99d-436c-4157-8d38-fbbb47c66f18/koxufaviworoki.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b4068342-2729-4607-a759-224f6e4e10c1/books_like_when_breath_becomes_air.pdfIn PDF document text
    • https://51956041-da35-40aa-96c1-085c1f47c80d.filesusr.com/ugd/e6e573_c4fdda6c542d4b4e964d4232ceceb836.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/f59c8fb6-93b8-4e52-8b0e-37d008caa760/how_to_play_guess_the_baby_food_baby_shower_game.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_off0000ca72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA72 5600 bytes
SHA-256: 61af1c63c3be88d8f1f1bfe6588b9f1d99d1d6ccb20b5976afcc81adba96cf8d
font_01_sfnt_off0000dd50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD50 10464 bytes
SHA-256: b669b98222ea2e6987b6d7064b1b588b55289f4baf6cb3943dd1d095c32f38e3

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