Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d7dfbc219a89d16…

MALICIOUS

PDF

70.6 KB Created: 2021-03-16 19:00:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 7ef4e088ff8867eb18542d90700b734f SHA-1: 9670d801aca7ac22fb79403d9430fb79de0acec2 SHA-256: 3d7dfbc219a89d16049da6b051504d0eea030c5679981172d4327ca68b0f9968
96 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. The document body, though partially corrupted, suggests a lure related to 'parts of the microscope crossword answers'. An embedded URI points to a suspicious URL, 'https://golowaki.ru/wix?keyword=parts+of+the+microscope+crossword+answers', which is likely used to deliver a malicious payload or conduct phishing. No scripts were extracted, but the PDF structure and embedded URI indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://golowaki.ru/wix?keyword=parts+of+the+microscope+crossword+answers PDF link annotation
    • http://usacreditmonitoring.info/harmony_hub_always_red2sqmq.pdfIn PDF document text
    • http://mozobadijoba.medianewsonline.com/vasonurulodexazanumima.pdfIn PDF document text
    • http://in-step.shop/reading_comprehension_test_for_grade_5r0lpd.pdfIn PDF document text
    • http://misstourist.info/53790843594czz8v.pdfIn PDF document text
    • http://fito4ka.xyz/why_is_my_fios_router_light_yellowbj1we.pdfIn PDF document text
    • https://mufanujirube.weebly.com/uploads/1/3/5/3/135348440/zuxotanesoditiw_jopotubidala_dubuguzado.pdfIn PDF document text
    • http://nariwunuzaw.scienceontheweb.net/sodokakizo.pdfIn PDF document text
    • http://wedevaz.sportsontheweb.net/badminton_court_dimensions_in_meters.pdfIn PDF document text
    • https://faloxumotib.weebly.com/uploads/1/3/4/6/134646793/4a2ba6.pdfIn PDF document text
    • http://vkysnaya-eda.site/bavudvo107.pdfIn PDF document text
    • https://tufakuxumiwe.weebly.com/uploads/1/3/1/4/131454237/kigevedoxotefex-difew.pdfIn PDF document text
    • https://gixujadimi.weebly.com/uploads/1/3/4/7/134708567/651933ece88d8.pdfIn PDF document text
    • http://porn77.design/alphatrak_2_instructions1kl5z.pdfIn PDF document text
    • https://mazokaru.weebly.com/uploads/1/3/5/3/135303974/bbcf712e8c5f.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/vavapekadoliti/tujosiredevomixap.pdfIn PDF document text
    • http://nomamazuzut.atwebpages.com/how_to_bypass_parking_brake_wire_on_kenwood.pdfIn PDF document text
    • https://s3.amazonaws.com/memobofilenabon/dried_bean_curd_sheets_recipes.pdfIn PDF document text
    • https://s3.amazonaws.com/fofeguj/learn_final_cut_pro_in_20_minutes.pdfIn PDF document text
    • https://s3.amazonaws.com/jufowokedunod/trig_graph_transformations_exam_questions.pdfIn PDF document text
    • https://98e80eac-0673-4bf9-a3de-4132461903b3.filesusr.com/ugd/1acd69_3c163f84da6642d3adc7dc6c2efa9dd5.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fatikonavori/foxtel_iq3_tv_guide_not_working.pdfIn PDF document text
    • https://41be308f-8a64-4dec-8b30-4937605be974.filesusr.com/ugd/f042fe_56806f03d84a405b849d0f66eea17f48.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_off0000d893.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD893 5456 bytes
SHA-256: a6d580f13cf9c08c7526c2de083c91285d51551893974d3555b41894b127fdd7
font_01_sfnt_off0000eb0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB0A 9936 bytes
SHA-256: f7daed1333a6dd40571d731a0970e866a0ad09f25a1e518fc5148dfdb95e15e6

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