Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b130937528f2686…

MALICIOUS

PDF

85.3 KB Created: 2021-03-29 01:08:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 8dc9a2fcc8b8d860af8907d9bd0403ed SHA-1: 8e2ededde39d41a2e1def65ccd190bbc622586e2 SHA-256: 2b130937528f268613d36b196a089f5020fe034af97c934f7bc4bfde0e1e6b82
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, with one heuristic specifically identifying it as a 'PDF_SEO_LINK_FARM'. This suggests the primary purpose is to manipulate search engine results or redirect users to potentially malicious content. While no scripts were explicitly extracted, the presence of numerous external URLs and the ClamAV detection as 'Pdf.Phishing.Trojan' indicate a phishing or malicious redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://lozipotod.ru/123?utm_term=bedingte+formatierung+excel+farbe+text PDF link annotation
    • https://cdn.sqhk.co/mevazasid/ghbie5B/battle_angel_alita_1993_english_sub.pdfIn PDF document text
    • https://cdn.sqhk.co/letarezetap/Goge6ib/lean_bulk_workout_plan.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392871/normal_603c06f8265bb.pdfIn PDF document text
    • https://cdn.sqhk.co/vizebika/1LqzIov/73574983608.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446270/normal_5ffd62208e3cd.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/nademopor/calories_in_dried_lasagne_sheets.pdfIn PDF document text
    • https://s3.amazonaws.com/debiwelof/2018_acc_aha_guidelines_for_cholesterol_management.pdfIn PDF document text
    • https://s3.amazonaws.com/bejeseja/dieta_cetogenica_recetas.pdfIn PDF document text
    • https://37bdae34-bb2f-403f-997c-54a7c09d9c06.filesusr.com/ugd/dc98cc_b2eaece32e614e819baf9d53f0b0fe40.pdf?index=trueIn PDF document text
    • https://e1d5fa5a-667c-4d22-bb72-2ec96b4ed0f7.filesusr.com/ugd/01f30d_e4bd266cff2f4322a5b2f2886183e374.pdf?index=trueIn PDF document text
    • https://4868a29a-6d77-448d-a9c5-bc5c6a1713c3.filesusr.com/ugd/060e50_b6fdd0a141cc49039bd0c1604b6b4a3f.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/242dc96b-c622-4d98-bd39-759233b3fc44/herman_miller_aeron_chair_parts_list.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5a0d2357-2237-432a-8f49-0e5fbc7d0f74/gisesu.pdfIn PDF document text
    • https://s3.amazonaws.com/dakebesuvum/77162953674.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b0301fcf-61a7-45df-b924-c601160bb918/malazan_book_of_the_fallen_total_pages.pdfIn PDF document text
    • https://488a161d-122f-4e25-b35e-34d1d0e27b34.filesusr.com/ugd/bbc910_48c596c7e66f4cb4b73cb732b62efd9c.pdf?index=trueIn PDF document text
    • https://f1ddcea9-c323-452c-a4d3-aaefec61e50a.filesusr.com/ugd/defd8a_768d7a56364446a9b69ca1058a8af1cd.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dudurat/assignment_front_page_format_in_word.pdfIn PDF document text
    • https://65de77fc-0341-4fd2-89b2-cd6b005a91de.filesusr.com/ugd/cf79db_4afdf482d87b4b96b2738dc83e1bfd6e.pdf?index=trueIn PDF document text
    • https://a84030a7-2e48-4039-807a-383e2b7216cc.filesusr.com/ugd/c5d40f_dffe71728a2749c59a9833319c16df17.pdf?index=trueIn 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
    • 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_off0000f651.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF651 5420 bytes
SHA-256: cf60a14e8f9c36a66ffef9e56067e84a2af6a17909137baab3a76b6dcf2a9486
font_01_sfnt_off000108b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108B5 11748 bytes
SHA-256: 27517b1582723ac4fb0727c013e424484d34ef44062ce31c56e6f6789484b763
font_02_sfnt_off00012fc9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12FC9 16312 bytes
SHA-256: bf8f9ece8d9d74ce2d7a98a07ee1bb8f4056faf702b3b1702118181e85f1b939

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