Malicious PDF — malware analysis report

Static analysis result for SHA-256 0685530237aa278e…

MALICIOUS

PDF

78.4 KB Created: 2021-05-25 05:03:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 486fc766dd5678cd6495759e1cf00cf7 SHA-1: c927830fd35240056c90c6e20aa685d7c9f8e778 SHA-256: 0685530237aa278e5d65224bd5d6144b4b9fb54500f0c885cd6cc4f291385dd9
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with one pointing to a suspicious domain ('maypoin.ru') that is flagged as a potential phishing or malware distribution site. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links suggest it's designed to redirect users to malicious content, likely for phishing or to download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://maypoin.ru/strik?utm_term=clavicle+bone+labeling+worksheet PDF link annotation
    • https://betutemibo.weebly.com/uploads/1/3/1/4/131453998/motumuva_fugozep_fotetitese.pdfIn PDF document text
    • https://fanapakukole.weebly.com/uploads/1/3/4/7/134756501/86fc4c40.pdfIn PDF document text
    • https://masenajeronuzes.weebly.com/uploads/1/3/1/6/131637464/loguxomidomixu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472764/normal_6050170de3976.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454056/normal_601795eb73b30.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485156/normal_5feb3957b4f27.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/4a294aa7-89b0-4d01-b249-033baf517eeb/nedekoxinuludezab.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/998d77c6-8e5b-4856-a0d9-02eeb024291a/how_to_use_annotation_on_zoom.pdfIn PDF document text
    • https://s3.amazonaws.com/dikobepibelun/how_is_leave_calculated_in_australia.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2a18c3c4-3242-4dd6-a727-c9b62cffc93f/wirupetitumevi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c73436c5-d80b-4747-a5c2-c49baa679a82/download_insaniquarium_deluxe_3.7.2_download.pdfIn PDF document text
    • https://s3.amazonaws.com/wizuluworafid/jeep_cherokee_2015_owners_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cd7cfeca-9ea9-4b49-b0e4-53a7590e2b67/80769899577.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d517d9af-7f5f-470a-b46a-51a2646f0a11/motorola_verve_buds_100_black_sh052_bk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eea8be91-4eac-4b01-b10b-2689525c5c42/dell_xps_8300.pdfIn PDF document text
    • https://s3.amazonaws.com/geradi/3444836606.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d38a055c-e59b-4381-aadb-aeefbb50ab7b/sea_of_monsters_full_summary.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/61455827-68ea-4317-a9b5-51346b98c9e3/how_to_get_out_of_debt_and_save_for_a_house.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b9dc61fa-1744-4857-b1b6-80fa73e61a3d/al_quran_tajweed.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/062671eb-a08a-40f1-939f-d71208b510e0/the_postman_always_rings_twice_chapter_summary.pdfIn PDF document text
    • https://s3.amazonaws.com/wolawatin/95594306347.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_off0000f582.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF582 5324 bytes
SHA-256: 60b29f3143194c4566cf742fbf30cb2fc0f05abe6e95783ce7012ea5f811d9ac
font_01_sfnt_off000107a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107A8 10920 bytes
SHA-256: 797bfd2ccae185f496b11259e9e3a0f34ed04261b324e5a1e9fa45c46ad93b1f