Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f77a1e00fb100d5…

MALICIOUS

PDF

177.5 KB Created: 2021-03-30 16:43:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: b010410799c0d67856ffd741c1b4941b SHA-1: 651f83d70823bfd250b6768a6d5660d22e08ed10 SHA-256: 6f77a1e00fb100d5cfe3d5208f61d3c6cc00ce0c894ffb04e74d739997d104c0
104 Risk Score

Malware Insights

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

The ML classifier and ClamAV detection strongly indicate maliciousness. The PDF contains external URIs pointing to suspicious domains, suggesting it's designed to deliver a payload or redirect the user to a phishing site. The presence of a 'download button' heuristic further supports a social engineering attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9954

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
  • 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://midufefew.ru/wix?keyword=kubota+mx5100+repair+manual PDF link annotation
    • http://nitiwomifigurod.mygamesonline.org/how_to_read_sensus_digital_water_meter.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388424/normal_5fcfeeaeae936.pdfIn PDF document text
    • http://gukevipagopu.mywebcommunity.org/kitchenaid_refrigerator_repairman.pdfIn PDF document text
    • http://paxosij.mygamesonline.org/becoming_vegan_comprehensive_edition.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447096/normal_602884358a2b5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489713/normal_60280cc3599f2.pdfIn PDF document text
    • http://gizovivomiz.getenjoyment.net/catgut_embedding_acupuncture.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417644/normal_5ffcc25de6a53.pdfIn PDF document text
    • http://rawoxaxevog.mygamesonline.org/wudifiwugulize.pdfIn PDF document text
    • http://fefiwizam.sportsontheweb.net/rovetopinabamuzufuxa.pdfIn PDF document text
    • http://tevaruv.sportsontheweb.net/kewenekegemumal.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369310/normal_603e5881207d8.pdfIn PDF document text
    • http://xazixovabifin.medianewsonline.com/precalculus_mathematics.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://s3.amazonaws.com/rekorewexidiwo/72436554566.pdfIn PDF document text
    • https://s3.amazonaws.com/tejuvonixag/kannada_english_dictionary_app.pdfIn PDF document text
    • http://totuxivez.onlinewebshop.net/free_crochet_virus_shawl_pattern.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5e29745b-d0fd-498d-889a-e11d1ede1d3c/2018_jeep_grand_cherokee_service_shifter_message.pdfIn PDF document text
    • https://s3.amazonaws.com/vuterijoze/51574704659.pdfIn PDF document text
    • https://s3.amazonaws.com/nafibanefexex/sample_resume_templates_for_highschool_students.pdfIn PDF document text
    • https://s3.amazonaws.com/zodawanuror/agriculture_system_in_india.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ecd1d137-52c8-44ee-81d6-2d8d10c187d5/bizosolutilisubigu.pdfIn PDF document text
    • https://s3.amazonaws.com/lunojol/alcohol_120_free_for_pc.pdfIn PDF document text
    • https://s3.amazonaws.com/nosepevozux/jafupewogep.pdfIn PDF document text
    • http://zukomakiduw.myartsonline.com/89151660801.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9b7ec434-a2cd-4b86-a2de-e6251eb2c243/why_does_my_fitbit_flex_have_2_blinking_lights.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_off00026fd8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x26FD8 5164 bytes
SHA-256: b63e60b5c14ffbe3c8cff055339736e00efcf3217980581140ed75695a2148ca
font_01_sfnt_off00028150.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x28150 11596 bytes
SHA-256: 7b6be6997c12bb9e7faea09442c5f25f5ed24ddd754e0fa4614ddc01c373aa55
font_02_sfnt_off0002a8f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2A8F0 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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