Malicious PDF — malware analysis report

Static analysis result for SHA-256 26e7d73dccf540e8…

MALICIOUS

PDF

78.2 KB Created: 2021-03-08 17:23:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 2d661da508a4f2fa62bc350e0329a74b SHA-1: c9d2db28217f6dbd55d71ca501946daa87bc1678 SHA-256: 26e7d73dccf540e8d82f8983599031f9cd98f4aa2f51f52e96683f64816be500
156 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing indicating a large number of external links, suggesting a link farm or phishing attempt. The embedded URL 'https://zajinet.ru/123?utm_term=forms+of+idolatry+in+our+society+today' is suspicious. While no scripts were explicitly extracted, the PDF structure and the presence of external links are indicative of malicious intent, likely to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 5

  • 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.
  • 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://zajinet.ru/123?utm_term=forms+of+idolatry+in+our+society+today PDF link annotation
    • https://cdn.sqhk.co/sevafeluba/ibifgde/art_sculptures_decor.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416930/normal_60305c23dca79.pdfIn PDF document text
    • https://cdn.sqhk.co/mutobudenit/hf89flj/skull_dungeon_forager.pdfIn PDF document text
    • https://cdn.sqhk.co/zezovajav/fgcid31/vikuwud.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393503/normal_5fd7124008dd1.pdfIn PDF document text
    • https://cdn.sqhk.co/vitimosugu/c7jb4hd/jodikofijominedazar.pdfIn PDF document text
    • https://cdn.sqhk.co/pigevikuwi/hb0hfia/5701700194.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/vudivuzakal/raja_bhaiya_movie_video.pdfIn PDF document text
    • https://05f6fcc2-a4c7-4d5b-b58c-97b640a93f4d.filesusr.com/ugd/74147a_f33660f9aafb4049852760d7167e8cd0.pdf?index=trueIn PDF document text
    • https://8ab1a2d5-e5b1-44c5-a28c-e09959565f0d.filesusr.com/ugd/eb712c_9f69b2fe9e124839a825783814c6b358.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xisakazelelinim/sengoku_basara_4_pc_english.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/305353ee-2d0f-4140-bc1f-7e756a7a0e42/golden_lion_tamarin_adaptive_features.pdfIn PDF document text
    • https://s3.amazonaws.com/gavapozalilup/akron_news_reporter_akron_colorado.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/61e9fec3-ff64-4b80-9944-004f3e35f039/are_all_the_game_of_thrones_books_finished.pdfIn PDF document text
    • https://s3.amazonaws.com/pokorevalaxex/46693717180.pdfIn PDF document text
    • https://s3.amazonaws.com/xenavuxa/kasimebefixodifuwuwag.pdfIn PDF document text
    • https://s3.amazonaws.com/nuxulikiwab/tesekowoxatimokan.pdfIn PDF document text
    • https://93bb5028-8b17-4c47-8ab9-f46a024b0e86.filesusr.com/ugd/041612_34d5feafe2f6482ab7508fc74011c04e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vazisi/supuvexafujizufib.pdfIn PDF document text
    • https://s3.amazonaws.com/zoromexemuzid/tuvajibadix.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a04fc9e1-ab97-47df-8f2e-78ae301e7a2a/mtd_yard_machine_lawn_tractor_parts.pdfIn PDF document text
    • https://b8e64ff8-a522-4625-8e91-70fe47930cb2.filesusr.com/ugd/37987b_d60e8a397c4d4af5b51481062fbd4a7a.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/ximupuv/67022054842.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7be72c89-adc4-41b4-8bb6-aa07ba98f6e4/dell_optiplex_780_graphics_drivers_windows_8_64_bit.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_off0000f3a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3A7 5224 bytes
SHA-256: a99bb60f67393b17d2fc9b9dcd9ffb3dde283a1a0c0fd5abf9a89a33d043ec21
font_01_sfnt_off0001055f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1055F 11600 bytes
SHA-256: c9ccd57d2c1ab6e7a19431c7307b9301344c68b0781568a5017432760152beab

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