Malicious PDF — malware analysis report

Static analysis result for SHA-256 a2c59f6939634f53…

MALICIOUS

PDF

97.3 KB Created: 2021-03-20 08:38:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 88e02d8e3b33b7cc2858604b34886c1f SHA-1: 5c5791fd3887728e4c1f23839439b85600083fdc SHA-256: a2c59f6939634f536a09e08304525ad20ed6b87d3bc35e7bff1988dac9fa2f50
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 0.9990

Heuristics 5

  • 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 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://baarspo.ru/wix?keyword=the+college+panda+sat+writing+answers+pdf PDF link annotation
    • http://lenulari.mypressonline.com/pdf_marketing_management_kotler_15th_edition.pdfIn PDF document text
    • https://nepuvojikonutoz.weebly.com/uploads/1/3/4/6/134677469/rulijoponusa.pdfIn PDF document text
    • https://cdn.sqhk.co/makubeku/ifngegg/grand_theft_auto_3_cheats_xbox.pdfIn PDF document text
    • http://watogoda.mypressonline.com/my_sweet_audrina_lifetime_movie_synopsis.pdfIn PDF document text
    • https://kumapeforurimo.weebly.com/uploads/1/3/4/6/134664671/6554610.pdfIn PDF document text
    • https://kitigenuripoduj.weebly.com/uploads/1/3/1/0/131070171/jegixalibe_buvidoj_fopezarejesu_kodenuwisajub.pdfIn PDF document text
    • https://cdn.sqhk.co/gepeduvo/aiijgjd/xbox_beta_cold_war_not_working.pdfIn PDF document text
    • https://cdn.sqhk.co/febenanedibu/aiaacZv/rally_definition_webster.pdfIn PDF document text
    • http://mawosatejojeka.sportsontheweb.net/35698864943.pdfIn PDF document text
    • http://kazexajisodibu.medianewsonline.com/logexadibomobujupix.pdfIn PDF document text
    • https://cdn.sqhk.co/zarudaletok/hhIjhgd/pinata_apple_nutrition.pdfIn PDF document text
    • http://kojazunupetip.mygamesonline.org/69375026631.pdfIn PDF document text
    • https://lexawuvake.weebly.com/uploads/1/3/4/6/134610488/2655994.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
    • https://810dce77-56ab-4324-823a-3549757f4eab.filesusr.com/ugd/1fad07_73e86e28c21c40609b33d4f7ce860d66.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/lorifumofelu/camtasia_studio_7_for_pc.pdfIn PDF document text
    • https://s3.amazonaws.com/lakujusitejojet/how_to_do_realistic_digital_portraits.pdfIn PDF document text
    • https://s3.amazonaws.com/wuwabobujasivor/44017833052.pdfIn PDF document text
    • https://s3.amazonaws.com/risisipajole/brave_soul_shoes_size_guide.pdfIn PDF document text
    • https://56076a71-1b70-41e8-afe1-d547c394b4ee.filesusr.com/ugd/ab0d05_71e77dca988b4ebab94612b132fe5eaf.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/lewuli/pesquisar_conceito_de_tecnologia_da_informao.pdfIn PDF document text
    • https://s3.amazonaws.com/mukut/lejuxikuzawaronusot.pdfIn PDF document text
    • https://s3.amazonaws.com/gowebabuxogiro/what_happens_in_new_moon_book.pdfIn PDF document text
    • https://s3.amazonaws.com/zijivevip/hack_game_clumsy_ninja_android.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012f5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F5F 5244 bytes
SHA-256: e9e65e43e1312690e849daca0914d8c9d9fc0aefde9542126aefe0898d407582
font_01_sfnt_off00014138.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14138 11620 bytes
SHA-256: a6a89baec18f39c70218a890be0f717e0a17942901e29fe486b43674bacc3204
font_02_sfnt_off000167db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x167DB 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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