Malicious PDF — malware analysis report

Static analysis result for SHA-256 d02c8a7753871c48…

MALICIOUS

PDF

82.0 KB Created: 2021-03-25 05:17:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 38ed96d148072ee7d042b947fe2667ab SHA-1: 15a12147770ac496145d3743c1c139b326298a63 SHA-256: d02c8a7753871c488b2e44b9cfe0a4f2dc19b3d93aa0ef9b69e2b54e0d2868db
156 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://midufefew.ru/strik?utm_term=why+interest+on+debt+is+tax+deductible PDF link annotation
    • http://muzibatixabu.mypressonline.com/business_plan_sample_format.pdfIn PDF document text
    • http://zizodoroluxonaf.sportsontheweb.net/28018107938.pdfIn PDF document text
    • http://pakupuxojopef.getenjoyment.net/soal_dan_pembahasan_aritmatika_sosial_kelas_7.pdfIn PDF document text
    • http://pubifirona.22web.org/alkynes_reactions.pdfIn PDF document text
    • http://virenoveza.22web.org/siworuwusa.pdfIn PDF document text
    • http://timecodes.net/novation_launchkey_49_mk2_midi_keyboard_fl_studio2w07u.pdfIn PDF document text
    • http://ketenimolupev.sportsontheweb.net/16984569700.pdfIn PDF document text
    • http://firstreadersclub.com/didivojowirumigi2yzgt.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/xonaxevetaf/edtpa_lesson_plan_template_new_york.pdfIn PDF document text
    • https://s3.amazonaws.com/peveziwoguxuzam/15656426134.pdfIn PDF document text
    • https://s3.amazonaws.com/tumasun/honda_accord_hybrid_2017_user_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/lixuduwonifa/pinuram.pdfIn PDF document text
    • https://e114ad41-1367-46fe-a5fd-427bf640f69d.filesusr.com/ugd/a63c55_fab3fd6e61204730b5ef33dae042cef9.pdf?index=trueIn PDF document text
    • https://023e3b0e-89aa-4e00-bd19-175c11a0a9c0.filesusr.com/ugd/5f4883_4ae96079f9c4486988755234b64e82a2.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jakujakula/chaar_sahibzaade_hd_movie_utorrent.pdfIn PDF document text
    • https://ca6b24e6-01cd-4368-a310-1df05077a315.filesusr.com/ugd/11b39a_bd3293ad50404c8c97ec90436de32fb8.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/rejiner/maytag_maxima_error_codes_e02_f06.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001030d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1030D 5352 bytes
SHA-256: 8ddaa04e76d17c2df9a29bdbf3b6366bc52aa1215df34a894fad082ce5d6d2b2
font_01_sfnt_off0001154b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1154B 10928 bytes
SHA-256: 355d51997584ef361b3071634bf91e35484aee3a1876bb35c4c3cdbf86c110cd

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