Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0513b21765c590e…

MALICIOUS

PDF

67.8 KB Created: 2021-02-24 02:26:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 970e88c0578fe1ad957518cec07235d8 SHA-1: ff30feafe5dc5e01b8d0894e4027fad5b33f1a63 SHA-256: c0513b21765c590eb6d4add7fa2ad92bb7072192af967ab85fd7860f80154726
96 Risk Score

Malware Insights

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

The file is a PDF document that contains an embedded URL, identified by the PDF_URI heuristic. The ML classifier and ClamAV detection strongly indicate maliciousness. The document body, though heavily obfuscated, appears to reference printer prices, suggesting a lure to a malicious website. The primary IOC is the external URI which is likely used to download a second-stage payload or redirect to a phishing page.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://maypoin.ru/wb?keyword=hp%202620%20printer%20price PDF link annotation
    • http://construt.site/zupiwuwebepdwj1v.pdfIn PDF document text
    • http://xesesevatep.22web.org/56488738171.pdfIn PDF document text
    • http://xadixul.66ghz.com/88184122961.pdfIn PDF document text
    • https://cdn.sqhk.co/fobonelaga/3JKicOE/japanese_translation_service_near_me.pdfIn PDF document text
    • http://zelenege.iblogger.org/xozosofixuvatewilu.pdfIn PDF document text
    • https://cdn.sqhk.co/tevunufoba/A5iaSha/how_to_draw_cartoon_monster_trucks.pdfIn PDF document text
    • http://zoom-omsk.ru/sonic_adventure_2_chao_editory1bga.pdfIn PDF document text
    • http://trikolor.site/does_juicy_fruit_contain_gluten2yx1v.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/tokatefozude/which_garmin_watch_is_best_for_ladies.pdfIn PDF document text
    • https://s3.amazonaws.com/kubafezin/zizoguvutuxibapiw.pdfIn PDF document text
    • https://s3.amazonaws.com/nunakixuma/kirby_super_star_ultra_true_arena_guide.pdfIn PDF document text
    • http://romevakamijoke.epizy.com/examples_of_solubility_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/woxotopapozokev/rudubifilelikele.pdfIn PDF document text
    • http://luloxefisamo.rf.gd/every_single_piece_of_information_crossword_clue.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_off0000ce05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE05 4896 bytes
SHA-256: 66b2c97ac6376aafce72da1fac1ca60f9ee4d3cbd8616296918c8af497165548
font_01_sfnt_off0000dec8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEC8 10412 bytes
SHA-256: 045a2fdf95984c28bb35e1a9500df4410c155d357ba332f9dbfd2e7464d56e52

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