Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ac4c04f34336efe…

MALICIOUS

PDF

73.2 KB Created: 2021-03-19 12:14:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: e6518b3503bbf3d3d3ec5c88f7c7cddb SHA-1: 65e5799a882d82855aad8caa1e5f8025ab4b2fc4 SHA-256: 7ac4c04f34336efe9eec4ac90ea660b4e2742c6c92388abdd7af264df608fd8d
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URL that directs users to a suspicious domain, likely for credential harvesting or malware distribution. The document body, though heavily obfuscated, suggests a lure related to 'questions and answers', aligning with phishing tactics.

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://xezojetit.ru/wix?keyword=an+hour+with+abuelo+questions+and+answers PDF link annotation
    • http://evromotors.net/asus_p7p550_e_deluxeroabb.pdfIn PDF document text
    • http://pozezan.mygamesonline.org/pdf_antidumping_manual.pdfIn PDF document text
    • http://natur-bio.space/70306687783pvy4e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475212/normal_604f54e38d97d.pdfIn PDF document text
    • http://eliyalte.com/causes_of_vietnam_war_worksheet4uwrr.pdfIn PDF document text
    • http://sawemawe.mywebcommunity.org/the_factors_necessary_to_compute_depreciation_include.pdfIn PDF document text
    • https://cdn.sqhk.co/gufezitaxato/2JvfeBI/medical_term_clasp_knife_phenomenon.pdfIn PDF document text
    • https://cdn.sqhk.co/lekusovu/fjdjeos/xatovidavomugu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4471948/normal_600490b9d20ba.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bifiwapaz.onlinewebshop.net/gevaw.pdfIn PDF document text
    • https://s3.amazonaws.com/livivuvuwugeb/delayed_male_puberty_treatment_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/jugobimuraje/potbelly_menu.pdfIn PDF document text
    • https://s3.amazonaws.com/mevuzokekenojab/how_to_make_a_bearded_viking_axe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1fa4a68a-6ace-43bc-b8d3-73f777de3f05/midnight_sun_movie_netflix.pdfIn PDF document text
    • https://s3.amazonaws.com/bufexa/17727593847.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8686f249-a91d-47b7-934c-8c767ebd01e5/what_percentage_of_gdp_is_income_tax.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_off0000dfd2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFD2 5260 bytes
SHA-256: d9be54a810d32e917f3ae067b55bc4c0a9ac449a5927a5de5655a1b84d289a83
font_01_sfnt_off0000f1b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1B4 10584 bytes
SHA-256: 8812f620c64329a8e2597928ec797ba75eaea60c67484a73dcc07adb989f7632

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