Malicious PDF — malware analysis report

Static analysis result for SHA-256 135a2246a9854470…

MALICIOUS

PDF

291.3 KB Created: 2021-02-17 00:43:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: cc6200b180471ade737421693cd4d828 SHA-1: c3ce38e3920403735e1db50a755780dc2ab9d0de SHA-256: 135a2246a9854470f0142a745f7423df97646e081d50f17ffe8f6e0b1cf9d6a1
96 Risk Score

Malware Insights

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

The file is a PDF document flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier. It contains an embedded URI pointing to a suspicious domain, 'jacksth.ru', which is likely used to host malicious content or phishing pages. The document body contains garbled text but the presence of the URI and the detection names strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9823

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://jacksth.ru/wix?keyword=kinh+pho+mon+chua+phuoc+hue PDF link annotation
    • https://cdn.sqhk.co/pazakazagoz/jJicFgh/weed_killer_safe_for_grass_and_pets.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4492574/normal_5fe39aeef206c.pdfIn PDF document text
    • https://cdn.sqhk.co/bavomizobe/ge7jHhc/35872058500.pdfIn PDF document text
    • http://fuwefepor.iblogger.org/thompson_alleluia_ssaa.pdfIn PDF document text
    • https://salexutoxor.weebly.com/uploads/1/3/4/7/134761189/5165592.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446921/normal_5fca825e3a0c3.pdfIn PDF document text
    • https://cdn.sqhk.co/sunalikefazo/fcDjdC2/zurolajojuwapuz.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/tutasujal/hp_jail_warder_answer_key_2019.pdfIn PDF document text
    • http://dolifusekaxug.epizy.com/protected_excel_sheet_password_recovery.pdfIn PDF document text
    • https://s3.amazonaws.com/piradi/non_resident_landlord_collection_agent_form.pdfIn PDF document text
    • http://wobemiko.epizy.com/game_bengali_movie_song_320kbps.pdfIn PDF document text
    • http://naxilolebepup.epizy.com/dell_latitude_e7450_price_new.pdfIn PDF document text
    • http://jujovotusenugo.epizy.com/angular_template_form_validation_number.pdfIn PDF document text
    • https://s3.amazonaws.com/nitizobuv/19873252837.pdfIn PDF document text
    • http://magomodatibotu.epizy.com/nigobokajuwobosavev.pdfIn PDF document text
    • http://mogerokefo.epizy.com/92208544965.pdfIn PDF document text
    • http://wolidile.rf.gd/ssc_chsl_descriptive_paper_format.pdfIn PDF document text
    • http://towawopijoxodor.rf.gd/marathi_balgeet_video_song_free.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_off00043ba1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x43BA1 3604 bytes
SHA-256: 7095dd4dcfd22f590249a2be6617763a37882ac5f0f3e1fad95daa6df2c1651f
font_01_sfnt_off00044867.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x44867 4836 bytes
SHA-256: 0ff1957aeffd04278fac62af006579491647aab219c530078f2e5413539a0f29
font_02_sfnt_off000458be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x458BE 10872 bytes
SHA-256: c93e8b4c90902298db297e1503ec12e38a0ceece1f8672d4f7ba1e357d46c699

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