Malicious PDF — malware analysis report

Static analysis result for SHA-256 326c858df8d02ec3…

MALICIOUS

PDF

64.8 KB Created: 2021-02-15 06:59:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 5908d03bd0f4df38b4afdb1b6bb496a1 SHA-1: cc60fa0119be885c558e93f8a66ec906817f4d6d SHA-256: 326c858df8d02ec3b9643702e05ac2363e089c2a2bf5d7b07cc44aef19a5db7a
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous external links, including a link farm, suggesting an attempt to redirect users to potentially harmful sites. The presence of embedded URLs and the heuristic 'PDF_SEO_LINK_FARM' strongly suggest a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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://jottigo.ru/123?utm_term=using+capital+letters+worksheet+for+grade+2 PDF link annotation
    • http://jobware.pro/rol_y_estatus_socialk52ig.pdfIn PDF document text
    • https://cdn.sqhk.co/surixirulol/iacEggi/color_notepad_notes_widgets.pdfIn PDF document text
    • https://cdn.sqhk.co/raserijene/Lyijmqv/33081648532.pdfIn PDF document text
    • https://cdn.sqhk.co/sururezog/hkKvOib/any_video_player_app_for_mac.pdfIn PDF document text
    • http://siankaanmexico.com/59472907410ff5u7.pdfIn PDF document text
    • https://jeregixir.weebly.com/uploads/1/3/1/3/131381720/kedosixaviro.pdfIn PDF document text
    • https://jefiwoso.weebly.com/uploads/1/3/5/9/135996081/zeduxulawagu-tafapofe-maxoregolufi.pdfIn PDF document text
    • http://crispyset.online/408634221000q7xb.pdfIn PDF document text
    • https://jovanifapekiba.weebly.com/uploads/1/3/0/7/130739678/zupuropuk-nolivexoxed.pdfIn PDF document text
    • http://reduslim-shopofficial.site/692865709585yecc.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/rupatojuko/67902787710.pdfIn PDF document text
    • https://s3.amazonaws.com/rikolesafuwofar/vorane.pdfIn PDF document text
    • https://s3.amazonaws.com/jeworurowam/cwm_recovery_img_for_any_android.pdfIn PDF document text
    • https://s3.amazonaws.com/rirusozo/furret_walk_sheet_music_flute.pdfIn PDF document text
    • https://s3.amazonaws.com/novipaliwid/clobbers_crossword_answer.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_off0000c00c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC00C 5696 bytes
SHA-256: 6fa94fd7387e159ab8a303a94af93966655de54bcc36f7ab5a55e694bc9aa232
font_01_sfnt_off0000d389.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD389 10240 bytes
SHA-256: 69d79afe2435023f27799a1ddcd682b5a4e75dbcf4cf4c25edf43bba59acc9bd

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