Malicious PDF — malware analysis report

Static analysis result for SHA-256 c5932b307c5acd32…

MALICIOUS

PDF

115.0 KB Created: 2021-03-15 12:08:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 72aa7fa4bb8461cee3ba384a66d09ffa SHA-1: 4e8538c5c1e06d2ebb84c1d4af4797aab141e6d6 SHA-256: c5932b307c5acd327bbf25494ccd490a46487a86188ff59be364bb0e7c89a923
202 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many pointing to disposable hosting, and one suspicious URL (soxebez.ru) that is not classified. The heuristic 'PDF_SEO_LINK_FARM' indicates a link farm designed for SEO manipulation, and 'ML_NYX_PDF_MALICIOUS' and 'ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0' strongly suggest malicious intent, likely phishing or redirection. The document body, though heavily obfuscated, contains text related to a movie download, serving as a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 8

  • 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.
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://soxebez.ru/123?utm_term=baaghi+2016+full+movie++filmyzilla PDF link annotation
    • http://onenature.space/hookah_bar_song_wapking359jd.pdfIn PDF document text
    • https://cdn.sqhk.co/zopizote/ggdifk4/minikaxidurabamup.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4391624/normal_5febc1788afa5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4444622/normal_5fefeb3f1c76d.pdfIn PDF document text
    • https://cdn.sqhk.co/kurotevu/jJWOid2/ticket_to_ride_board_game_strategy_europe.pdfIn PDF document text
    • http://stroiline74.ru/what_does_the_good_shepherd_do_for_his_sheepcm5zw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418587/normal_60333f6a2f937.pdfIn PDF document text
    • https://cdn.sqhk.co/lijuwezasip/i9hbEic/35034474517.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://dfdccaec-9019-42eb-ab8c-14eed22d5f88.filesusr.com/ugd/2e00cc_8729c0cbfc82499bb4609bace4530710.pdf?index=trueIn PDF document text
    • https://90ff81fc-98d9-4e53-96a3-aaa5c1c2042e.filesusr.com/ugd/bb5aff_9ab1b377c0bd4f07ad520f831128ee1d.pdf?index=trueIn PDF document text
    • https://27f1a270-5048-4778-87f0-574dfe85248a.filesusr.com/ugd/b7306e_2e8fe3d97c5a4895ba374e785a5b2471.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/d47980e6-906b-47cc-8904-bd4357ae7655/what_is_the_difference_between_general_and_specific_statement.pdfIn PDF document text
    • https://77483064-5892-4b52-b419-66e751946b77.filesusr.com/ugd/ef7b09_1d533ddb4ec94841ad1f82ba07e74b16.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/ae709ce9-729e-4ace-8ded-bc30e0db7412/the_nicomachean_ethics_quotes.pdfIn PDF document text
    • https://6f672a44-e16c-4921-a0f1-e3781c0647c5.filesusr.com/ugd/bda22a_4b4e2233d0b7470e9b43d91431d0aaed.pdf?index=trueIn PDF document text
    • https://ef733714-782c-48ea-8991-1bc0bf0c95f2.filesusr.com/ugd/ad2ade_fa58def54f9941acb1ac19dfeccee9a3.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/cd1d43f2-ed32-42a9-a03c-4325ec915a9b/the_little_prince_excerpt_by_antoine_de_saint-exupery_summary.pdfIn PDF document text
    • https://75ca6b5e-a470-4e0e-8004-b00a9f1721b4.filesusr.com/ugd/1e4819_002360d3ce43425098f9f48ae5877895.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 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000147e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x147E6 5344 bytes
SHA-256: 89e2bfd86134cb236079c3eacd43344911ef5ed0f0896524de7003ede8ba3d33
font_01_sfnt_off00015a2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15A2D 1592 bytes
SHA-256: b6d21e7a7fdb80c18d46e6e4db7a6916b90f8d2667bd19aa5d2f4d686a987029
font_02_sfnt_off0001624f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1624F 12396 bytes
SHA-256: 08c03f6c889ee311b373f71ac841933e108926a5405c5f3188d4fc2020e19cd1
font_03_sfnt_off00018bc6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18BC6 16964 bytes
SHA-256: d6cd4d31f68b7c23bfea4a0cef38b8e51305d056e2ea3ff64a5688527bb9306e
font_04_sfnt_off0001a3b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A3B5 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f
font_05_sfnt_off0001b1b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B1B6 2832 bytes
SHA-256: d7a1248cabf161ff78a072bd924b98f1b4e551660f4e151c9433689786990c0c