Malicious PDF — malware analysis report

Static analysis result for SHA-256 d01799ab1dad37d4…

MALICIOUS

PDF

75.7 KB Created: 2021-03-10 11:45:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-13
MD5: 79b9e0379603f862a5547cb13e741d75 SHA-1: a81ad1699e57992d6a5cd858c2b2b40efc6ee922 SHA-256: d01799ab1dad37d476b78d73c488bbb0c543aa285e14e41ad77e5545860051c2
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, a technique often used for SEO link farms or to redirect users to malicious sites. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically identified as Pdf.Phishing.Trojan. The presence of embedded URLs and the heuristic PDF_SEO_LINK_FARM suggest the document's primary purpose is to distribute links, likely for phishing or malware delivery.

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://kuzutuzo.ru/wix?keyword=animal+classification+worksheet+pdf PDF link annotation
    • http://xulodol.mygamesonline.org/xupebejexabadigi.pdfIn PDF document text
    • http://italywow.space/lord_of_the_flies_movie_1990_analysissed1b.pdfIn PDF document text
    • http://2020coupons.info/duluxewimanitiwoxugisrdfbf.pdfIn PDF document text
    • http://raxejudesezix.scienceontheweb.net/bissell_proheat_2x_healthy_home_pet.pdfIn PDF document text
    • http://lessonsonline.site/zemijojovopaoqg6q.pdfIn PDF document text
    • http://wumomotetidofe.getenjoyment.net/how_to_hire_a_machine_learning_engineer.pdfIn PDF document text
    • http://creamwalls.space/person_in_overall_charge_crossword_answeryd470.pdfIn PDF document text
    • http://silver35.ru/liftmaster_chamberlain_41a5021-1h-315_garage_doorf4elo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://df4002df-ed14-466c-b758-10ced248c840.filesusr.com/ugd/3b03e6_9722f72449ef4465af0446fc7fdb1d95.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xomepixo/dole_pineapple_juice_nutritional_information.pdfIn PDF document text
    • https://s3.amazonaws.com/kotenu/vipijujusoxabesodajudol.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8094efab-e3d1-4ef6-9ea1-43ee0daa15f3/2008_jeep_grand_cherokee_3.0_crd_problems.pdfIn PDF document text
    • https://f2d828cf-06d9-46ea-85af-d88b0bc20d44.filesusr.com/ugd/501a20_c8e8bbf89aab493caedaf80610663019.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jipowumat/best_solar_car_battery_tender.pdfIn PDF document text
    • https://s3.amazonaws.com/wewiro/61722583426.pdfIn PDF document text
    • https://75ca6b5e-a470-4e0e-8004-b00a9f1721b4.filesusr.com/ugd/1e4819_5e8b4071f91146c787958216ca9386e8.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/4d531655-26e9-489c-87d2-fc66c41348c7/resea_de_romeo_y_julieta_libro.pdfIn PDF document text
    • http://jezevenakos.myartsonline.com/muwebomemu.pdfIn PDF document text
    • http://fazovalekotevo.onlinewebshop.net/47086316751.pdfIn PDF document text
    • https://6129906d-bc82-46a7-99f5-71793a58af3c.filesusr.com/ugd/d162e3_d3afb210bc8d45de92ed833d8e0e31af.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ea0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA0A 5540 bytes
SHA-256: 09f71600451d34b8d7a5fdaed2a540a5993a751871dbcaa209716ebe8a5349f8
font_01_sfnt_off0000fcc5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCC5 10896 bytes
SHA-256: 50857988c897609be20268f6762e0c975070e2b2f0560debf4e95397d1ee9bbd

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