Malicious PDF — malware analysis report

Static analysis result for SHA-256 048173705fbe3f3e…

MALICIOUS

PDF

108.2 KB Created: 2021-02-24 07:57:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: e2c347a43759ff8bbb45b68916254b1b SHA-1: 3333f6aafdb3c31a6331f5903f22a6352f5762de SHA-256: 048173705fbe3f3e7647aa6903446e6f5215818e4dc2ec52ce9b763d96694608
134 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, with a high ML score. It contains numerous external URIs, many hosted on disposable domains or link farms, suggesting a phishing or malware distribution attempt. The presence of a 'download button' heuristic further supports a lure-based attack pattern. Although no scripts were explicitly extracted, the PDF structure and numerous embedded URLs indicate it is designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://jacksth.ru/123?utm_term=antique+royal+typewriter+repair PDF link annotation
    • https://kedifekutijita.weebly.com/uploads/1/3/4/7/134713117/4044775.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467560/normal_60121b7e2f148.pdfIn PDF document text
    • https://rubexanow.weebly.com/uploads/1/3/5/3/135346757/mapirugijinataw_nazukifutan.pdfIn PDF document text
    • https://loratabupufedev.weebly.com/uploads/1/3/2/6/132695903/xusediponozafi-jivagu.pdfIn PDF document text
    • http://topsale.pro/8636371228cb2vj.pdfIn PDF document text
    • https://tiruvodeg.weebly.com/uploads/1/3/4/8/134892329/37d25.pdfIn PDF document text
    • http://bridgecommerce.com/dapezogafadigalatopu4t92t.pdfIn PDF document text
    • http://uggi-ugg.com/abhimanyudu_naa_songs_freeemqc9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416132/normal_5ff936addc0e7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490116/normal_5fef7adf3f5fc.pdfIn PDF document text
    • http://stonersfranchise.com/73516932443at7p7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369185/normal_5fd032239af91.pdfIn PDF document text
    • http://zerkalo-fugicar.website/24332614603li06h.pdfIn PDF document text
    • http://good-production11.site/vixulakoviwisajigavavovsflcv.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://lififisemevuko.rf.gd/como_crear_un_archivo_xml_a_partir_de_excel.pdfIn PDF document text
    • http://kagelos.rf.gd/78234690848.pdfIn PDF document text
    • http://puvusevakap.epizy.com/72035594843.pdfIn PDF document text
    • http://pobuwejugu.epizy.com/can_you_eat_taco_meat_on_keto_diet.pdfIn PDF document text
    • http://vaxalisuj.rf.gd/bp_interview_questions_and_answers.pdfIn PDF document text
    • http://bokonejedebi.rf.gd/sap_hybris_commerce_accelerator_data_sheet.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00015ca8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15CA8 4828 bytes
SHA-256: 7e753fc940ab41901ce0f7c1d1bbeb1eae5a777a93d0a3dd047273ce3b8e9277
font_01_sfnt_off00016d31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16D31 12020 bytes
SHA-256: b7a77f6d465a42658e973341298ebc8ea9ce41d2eef03e2ad75e84beb65f7355
font_02_sfnt_off0001952f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1952F 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

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