Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a878f445621642e…

MALICIOUS

PDF

69.6 KB Created: 2021-02-22 09:46:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 87c4c97cd8d10050f4dcf19f72ed4693 SHA-1: 105ba46410ef88165ce357651df33127821d44c1 SHA-256: 1a878f445621642ebb29c5e60d67359a1c199fcba1605083e3288d9818934c32
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 pointing to a suspicious domain, identified by both heuristics and a machine learning classifier as malicious. The ClamAV detection further confirms its malicious nature. The document body, though heavily obfuscated, appears to contain text related to technical queries, suggesting a lure to trick users into visiting the malicious URL for information.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://maypoin.ru/strik?utm_term=oracle+pl+sql+continue+loop+after+exception PDF link annotation
    • https://cdn.sqhk.co/liripudeb/hh6ietM/pazuronodipiwovolavese.pdfIn PDF document text
    • https://cdn.sqhk.co/milagaleja/jfJgd0z/pdf_document_translator_apk.pdfIn PDF document text
    • http://gawoxubut.22web.org/lockport_ny_accident_reports.pdfIn PDF document text
    • https://cdn.sqhk.co/jovowosifo/jjibjjx/71120460680.pdfIn PDF document text
    • http://damodudajipofem.22web.org/chimpanzee_politics_frans_de_waal.pdfIn PDF document text
    • http://fuwefepor.iblogger.org/pukan.pdfIn PDF document text
    • https://cdn.sqhk.co/xuxawexa/sdjwBgc/zelolomagemoxo.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/jugobimuraje/20047674738.pdfIn PDF document text
    • https://s3.amazonaws.com/debiwelof/52605399828.pdfIn PDF document text
    • https://s3.amazonaws.com/gopuze/creative_presentation_format_ideas.pdfIn PDF document text
    • https://s3.amazonaws.com/gomaxod/black_spiderman_full_hd_wallpaper.pdfIn PDF document text
    • http://rujunigowe.epizy.com/property_irregularity_report_brussels_airlines.pdfIn PDF document text
    • https://s3.amazonaws.com/pibajuwi/37379250099.pdfIn PDF document text
    • http://beduxidav.epizy.com/uses_of_computer_network.pdfIn PDF document text
    • https://s3.amazonaws.com/divexikav/how_to_scan_officejet_4500.pdfIn PDF document text
    • https://s3.amazonaws.com/tawosutosuxi/4893844698.pdfIn PDF document text
    • https://s3.amazonaws.com/dedinavesute/22989311579.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_off0000d0d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0D1 5228 bytes
SHA-256: c2a60b19e75dbc571aad517c6ec4607c116910a4b67656f1760afd30fe77e575
font_01_sfnt_off0000e2b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2B4 11384 bytes
SHA-256: 8bec4d76ca9aac8d9c7ba5e198c8ba9e681cd48f39152394b015cf0fc9daa27e

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