Malicious PDF — malware analysis report

Static analysis result for SHA-256 512998bbfd6e476b…

MALICIOUS

PDF

65.1 KB Created: 2021-02-13 19:39:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 95466a1b614620ae833a8f5a06da0106 SHA-1: 5dc9584cb5cdf025f258023695f134ed0eba2b4f SHA-256: 512998bbfd6e476baa4812777127858e3ef25a956be9f0d9dd2fc855723a3293
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, identified by the 'PDF_SEO_LINK_FARM' heuristic, suggesting it's part of a link farm or SEO spam campaign. The primary external URI points to a URL that mimics a search result for "cartesian plane quadrants pdf", indicating a lure to drive traffic to potentially malicious sites. While no scripts were explicitly extracted, the PDF structure and numerous external links strongly suggest a malicious intent to redirect users, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://jottigo.ru/wb?keyword=cartesian%20plane%20quadrants%20pdf PDF link annotation
    • http://littlenat.space/free_printable_chore_chart_templates_for_adults73xfw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367617/normal_601854c18780e.pdfIn PDF document text
    • http://zebrait.fun/the_game_of_life_board_game_2007o267p.pdfIn PDF document text
    • http://freds.space/negin_vand_eye_colory7bft.pdfIn PDF document text
    • http://idealslimitaly.site/1818952289883m7m.pdfIn PDF document text
    • https://tepidupelagoxu.weebly.com/uploads/1/3/4/4/134472529/3119102.pdfIn PDF document text
    • http://wosuxetomokife.22web.org/bejazarigibajamopodipi.pdfIn PDF document text
    • https://mujebaroso.weebly.com/uploads/1/3/4/1/134131407/jojuwa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367000/normal_60138ce62898e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470035/normal_5fe668036f79d.pdfIn PDF document text
    • https://mokazeke.weebly.com/uploads/1/3/1/3/131384082/4424c5.pdfIn PDF document text
    • https://cdn.sqhk.co/budajawisore/ibjbDhd/the_solar_system_not_to_scale.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/dinisemowoge/macmillan_gateway_b2_workbook_answers_unit_5.pdfIn PDF document text
    • https://s3.amazonaws.com/sesijesule/axes_io_apkpure.pdfIn PDF document text
    • https://s3.amazonaws.com/xeruxaxer/82410926862.pdfIn PDF document text
    • https://s3.amazonaws.com/sisaxu/alphabet_letters_worksheet.pdfIn PDF document text
    • http://leruxesotagas.rf.gd/belling_integrated_oven_manual.pdfIn PDF document text
    • http://pifamodaz.rf.gd/cours_automatisme_hydraulique.pdfIn PDF document text
    • http://zarazemudaseri.epizy.com/adobe_flash_player_for_firefox_ubuntu.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_off0000c32d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC32D 5064 bytes
SHA-256: 8e907627e62e7a6486754f06b2e2a720dc200df02fe779c1c193cda7077a8bcb
font_01_sfnt_off0000d46e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD46E 10220 bytes
SHA-256: ee97d8978c986a90d2204822f4c633b318234eaaaedcd490e534f6332751d63d

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