Malicious PDF — malware analysis report

Static analysis result for SHA-256 1db29626a04b2283…

MALICIOUS

PDF

82.5 KB Created: 2021-03-15 13:51:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 5bff5bdeb37235a88bfcb21cece57f49 SHA-1: 9c60cdc900284b58c38e7f0b1ca5643432bd4286 SHA-256: 1db29626a04b2283ba85bd373beff7bca876235df5d3fe62a1c713deba0198a5
156 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. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://jacksth.ru/wix?keyword=bill+nye+climate+worksheet PDF link annotation
    • https://cdn.sqhk.co/regavebike/6hc7ioO/zuretulomamed.pdfIn PDF document text
    • https://cdn.sqhk.co/kinibemazoz/qDjcSha/microsoft_authenticator_new_phone_not_working.pdfIn PDF document text
    • http://busibear.com/4955040780235x5u.pdfIn PDF document text
    • https://cdn.sqhk.co/tuwesedujila/jege45T/25023004084.pdfIn PDF document text
    • http://smirnoff-optic.com/juxevitekuwerufijvlq.pdfIn PDF document text
    • https://cdn.sqhk.co/dasewugiru/iIvftfD/best_pickaxe_enchantments_minecraft_bedrock.pdfIn PDF document text
    • http://tersq.space/legenegu5ohvk.pdfIn PDF document text
    • http://winsbig.space/sexenaliwerogavevativexun6mfx.pdfIn PDF document text
    • https://cdn.sqhk.co/saxezekobida/ji9Tjay/gcw_bloodsport_2019_card.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/besafefaf/alternity_core_rulebook.pdfIn PDF document text
    • https://2ddedb0e-b7b0-41c9-a8bc-c018bd0e6e4c.filesusr.com/ugd/70094d_96305eff3087407ba1f1cb1d973d3015.pdf?index=trueIn PDF document text
    • https://ced6af22-cf5f-4df0-9cd6-2d424634d287.filesusr.com/ugd/3eed2b_f25c0712566440ea940b18c244ce673d.pdf?index=trueIn PDF document text
    • https://fccd5518-64e1-462d-9dbe-8d8d8a19ca7a.filesusr.com/ugd/eb005d_1902f6b8680f47fa8606e4a87879eb46.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/suximawo/mountain_buggy_carrycot_plus_instruction_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/lorerexeg/gree_air_conditioner_remote_control_manual.pdfIn PDF document text
    • https://3b044092-e341-4c69-a8e2-52b14fc1865f.filesusr.com/ugd/370021_1491ca50ef2148de8638acea45debe85.pdf?index=trueIn PDF document text
    • https://128fc002-9ed4-4a8f-9a6b-83b43563a9ed.filesusr.com/ugd/6812d7_2d31e11a3c754f0cad362aed0998056a.pdf?index=trueIn PDF document text
    • https://b20aee1f-b1b7-4e4e-be5e-d884e4ece670.filesusr.com/ugd/10e3af_5b6547a69a094e27939ba7f6c3f4e1ff.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vanatul/gatax.pdfIn PDF document text
    • https://s3.amazonaws.com/fibesezati/how_to_make_a_time_capsule_box.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://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_off0000edcd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDCD 5348 bytes
SHA-256: 643bbee7f2366c9de2ecafd4ff73865f2cf363a1794c601514358b820dd23561
font_01_sfnt_off0000ffe8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFE8 11660 bytes
SHA-256: 40a7413621dd3d819fc3618cb9b07005f1b280f2171f9ea6fac16e04c0421353
font_02_sfnt_off000127bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127BB 16144 bytes
SHA-256: 18f56b7fae04e07bc119a468ad323bdda099da77b0772854d1c47cc1f39b9f3b

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