Malicious PDF — malware analysis report

Static analysis result for SHA-256 9fd68014783bed3f…

MALICIOUS

PDF

98.2 KB Created: 2021-04-04 18:13:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 148b003b44eee2746471d39c69d48057 SHA-1: 6a846be5b5a50127b020e7000fda94ea6bd086f7 SHA-256: 9fd68014783bed3f02957d767faed915ca5bcbf71c2cc9b2dd63fcb487659287
186 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to disposable domains, indicating a link farm or SEO manipulation tactic. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9945

Heuristics 6

  • 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.
  • 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://gimoguvi.ru/award?keyword=que+es+caida+libre+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4494432/normal_5fc9d6f60808f.pdfIn PDF document text
    • http://moymagazin.xyz/undertale_battle_simulator_play_onlineh06w5.pdfIn PDF document text
    • https://cdn.sqhk.co/tatidukigag/a0ihVIe/9352275150.pdfIn PDF document text
    • http://idem-peshkom.ru/pibetegohrc4.pdfIn PDF document text
    • http://uablog.website/what_is_sacred_geometry_yogavzaox.pdfIn PDF document text
    • http://tvoyoproc.fun/pujamuregopikofutusefllbk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426953/normal_602f4750f2375.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365634/normal_5fc94f2b93874.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375889/normal_602c760ed983a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365653/normal_6057e33da8343.pdfIn PDF document text
    • https://cdn.sqhk.co/kigimole/igkidhh/tower_defense_crush_empire_hack.pdfIn PDF document text
    • http://conicppjry.bid/physician_assistant_emergency_medicine_residency_californiagfn4h.pdfIn PDF document text
    • https://cdn.sqhk.co/jalafimimodo/aBCDiex/xfinity_tv_guide_albuquerque.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/121daa77-1ad3-4c6e-8fc0-514c8b60ea8f/doorking_1812_installation_manual.pdfIn PDF document text
    • https://67258aaf-84c5-4a88-bfd2-1aa7ddb6c27a.filesusr.com/ugd/850f07_d4418e1acd0047ea922ec1092661130d.pdf?index=trueIn PDF document text
    • https://d7e981a8-8c4a-445e-aef0-60d3d4911bd2.filesusr.com/ugd/65d69c_adbed2a189c24f64bb206ba6410a593b.pdf?index=trueIn PDF document text
    • https://8c4778c4-ed17-4cf1-86f9-5448e21c5c15.filesusr.com/ugd/6da380_d0b01a338a414d1a908fef7268717dc8.pdf?index=trueIn PDF document text
    • https://e7ba4f66-d023-404d-a355-a5b98970f127.filesusr.com/ugd/cac9e4_60e95fb1dbfb41f8b9ea6cdfdbf810be.pdf?index=trueIn PDF document text
    • https://d429d46a-6203-486b-8c9d-ede5597e1383.filesusr.com/ugd/419b00_4670a9f52c1f45ee90abe291fc8db08f.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/587cdf84-f429-4338-89af-74826df66903/54204654119.pdfIn PDF document text
    • https://5090c2af-253d-40c3-bfb7-942fc6db26b0.filesusr.com/ugd/0511f5_11f11e8bce55475eb4e63fde3b7d2d29.pdf?index=trueIn PDF document text
    • https://44034db3-6cdd-4729-adf3-7ccd6afcf354.filesusr.com/ugd/9fe9cc_e63ee29e34c0498a8c8cc3126fc2bfe8.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/81561414-1e10-4b36-be3b-427bf1091c05/is_arbys_fish_sandwich_still_available.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/225390db-b114-45d3-834b-b4de42228d12/how_to_make_the_most_of_your_twenties_book.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/56483bb8-b2ac-4604-b25e-1741d899e4d4/rumble_fish_movie_free.pdfIn PDF document text
    • https://dd54f144-242a-4a88-9385-6c39f9996aab.filesusr.com/ugd/9f32c1_8cf9fda3ed914c6f943e0996fed7bdc3.pdf?index=trueIn PDF document text
    • https://35503bd4-e3bf-42a3-b196-9304570062b9.filesusr.com/ugd/e3c460_3f3ebf1e00464a5fa4ffa31fa066a8e7.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_off0001252e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1252E 5348 bytes
SHA-256: 3145d256b7348bbe5239b6171ea8f6ff65e8a3dbda586536601b17dc504fbdff
font_01_sfnt_off00013762.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13762 14088 bytes
SHA-256: b15612ef80a7df99429ab1178cbbedf9b019c152b479b5ebb217ceec31e1744b
font_02_sfnt_off000165a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x165A6 16212 bytes
SHA-256: cd1f71424615506230c840940a367a2cfe25764e15f580569c960970e9ff3aa9