Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a626fe57812f925…

MALICIOUS

PDF

93.7 KB Created: 2021-03-29 17:00:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: f6687a8cecbc33905fe1c5575777f05b SHA-1: 567361344d51f38f66174cce44bdd0ac7d3b3ed9 SHA-256: 5a626fe57812f925cfe1b2448cf91c222195f266b0641832776f2a0559d4ecd0
134 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 6

  • 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 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.
  • 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://lozipotod.ru/award?keyword=kalabhairava+ashtakam+lyrics+in+sanskrit+pdf PDF link annotation
    • http://ch-data-2a8fv9s.pw/bupeduriwinsipgm.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454179/normal_6030cf946202d.pdfIn PDF document text
    • http://getcreditcheck.info/how_to_draw_reiki_master_symbolcoh8a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468537/normal_6017445cd9d9c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475580/normal_5ff793cce2732.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417818/normal_5ff9b3045d535.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376625/normal_603213fbc0970.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389570/normal_603b9d746fc99.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4463794/normal_5fe014b93f01c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393779/normal_5fca646c96a4d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403129/normal_5fe5e97c141e4.pdfIn PDF document text
    • http://heretythere.site/steamer_for_food_in_stainless_steelpbubf.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://uploads.strikinglycdn.com/files/4753bade-9bda-4f6c-9bc2-1b1225823680/nuwivufipigakeloborefo.pdfIn PDF document text
    • http://luvurukakun.epizy.com/93699496471.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6ead2d75-ec65-4a48-9f2c-b4db89d847f5/legaw.pdfIn PDF document text
    • http://sofidubanelen.epizy.com/rootjunky_frp_bypass_apk_1._0.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8670b031-4119-442a-88fc-d9337ff69b81/what_size_is_30_x_45_cm_in_inches.pdfIn PDF document text
    • http://wawefib.rf.gd/bumokobirat.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5786ebb2-9f1e-41ef-aec7-62c2d50097b5/d-link_verizon_router_dsl_2750b.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1c86c77a-5423-469d-94ab-e2cdbf520282/zurukorufenipu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d9933e5a-59df-4781-b379-e2eb6f006ddd/75306760808.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
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f7fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7FD 5732 bytes
SHA-256: 489e998849828e19c84d6e7e93d1a47c9db775ab1bab744d1a719839ffa5cad4
font_01_sfnt_off00010b54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B54 3772 bytes
SHA-256: 9389eabb5da0f7ff5893e499ff791b47d46466a46589dcf6e6727fbd9e34bd63
font_02_sfnt_off000116fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116FA 10212 bytes
SHA-256: d5ad2b5a7d7dc57e94b2be95b60eeecf639e038949665ff1525618a394a3e9a2
font_03_sfnt_off00013a34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A34 15212 bytes
SHA-256: f39b6f216ef9356939b6c4af008e3a5c42274435f77c30a94f6fc855a3352bcc