Malicious PDF — malware analysis report

Static analysis result for SHA-256 29330a8336404ee0…

MALICIOUS

PDF

203.1 KB Created: 2021-04-05 21:26:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: bb3fa1b59b072821a2222117b9290589 SHA-1: 780d69d6b96f5ca622acee13790b347243f4b7d2 SHA-256: 29330a8336404ee032f5c9811b8b17edc2c1de0ebb7c3b2cd4a7a7e98f18fbb3
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. The document body, though heavily obfuscated, contains references to 'wkhtmltopdf' and a URL that appears to be a lure. The presence of embedded URLs and the overall detection by multiple engines strongly suggest a phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9913

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://xezojetit.ru/strik?utm_term=jorge+luis+borges+obras+en+espa%25C3%25B1ol PDF link annotation
    • https://fidexodopisulo.weebly.com/uploads/1/3/4/8/134861067/gupew-tupovowidid-guwunuj.pdfIn PDF document text
    • https://kufibewiti.weebly.com/uploads/1/3/1/4/131406300/2817492.pdfIn PDF document text
    • http://teaapple.space/geometric_patterns_worksheets_5th_gradedfpqb.pdfIn PDF document text
    • https://kamobukumigudeg.weebly.com/uploads/1/3/1/0/131069934/734352.pdfIn PDF document text
    • http://yyyyyyhhhhh.space/amass_xt601ln01.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://23fe9111-5aa3-4288-b7a4-a84c242bb647.filesusr.com/ugd/d35b85_92ee1a60516c4ad5bcce02e44b99879c.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/c666a3dc-5342-4b07-8b22-083ba7ef62b3/othellos_last_speech_analysis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/14bebb74-dd2b-466e-b2d4-6f5f2b4bc83d/95453832231.pdfIn PDF document text
    • https://4541bc1c-e35c-4de3-bb44-1f53c3e1a56d.filesusr.com/ugd/68f66e_972f21ba591e45d39ae52118ab42caac.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/8614045a-8214-40df-b375-b6918188622c/62974079463.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/34e10123-e8ea-47e8-83bc-e56c196217bb/87529118762.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b849d3fc-4160-46eb-9425-884a42583b3f/68515475693.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5c90e075-b36a-48c9-9f37-54af06d1049d/transition_words_and_phrases_exercises.pdfIn PDF document text
    • https://s3.amazonaws.com/duzexefemosaxe/87548308561.pdfIn PDF document text
    • https://0f926834-650c-4d5a-b53c-ad60ae412ccc.filesusr.com/ugd/6a44d8_163f4d3758ea466a9c5e269b9e1b2cd5.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/b62fd23a-ad00-4221-80fb-455f4726e02c/is_darth_bane_the_most_powerful_sith.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f8ac6f9a-9486-42a1-b726-f69891c2ea48/tuzisutevobinutusa.pdfIn PDF document text
    • https://s3.amazonaws.com/wupiwupiwot/nibujivawarolobuz.pdfIn PDF document text
    • https://s3.amazonaws.com/wovisak/pevomelaranapovumexu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6f2c8cda-f88c-41ca-b4c8-3fe23c670d55/85906695675.pdfIn PDF document text
    • https://d17f4099-ecc1-42b1-9c73-51521793457c.filesusr.com/ugd/4a2613_25df597ca2cc4d17a4c0663d763c2824.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_off0002dcd5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2DCD5 5328 bytes
SHA-256: 0f8a03255684488f0f92dc0d7a6e6f4609a36bb0f1ac611683f88e13b96a2b44
font_01_sfnt_off0002eebd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2EEBD 14940 bytes
SHA-256: 37032a1b4dbb2a632a3f468174b90125f88e504307acd8bc462aa2caf4a1b5ab

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