Malicious PDF — malware analysis report

Static analysis result for SHA-256 5238eebd35729597…

MALICIOUS

PDF

85.1 KB Created: 2021-03-08 21:37:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: f972648ffa2f569c2ab60fa74dfc7ea7 SHA-1: 02cd77eb9c0215c3e9be90a271b541a0a2631dba SHA-256: 5238eebd3572959758725247d998934ea5fb3bd5e23713bf142addf2f1ca5d48
164 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to other PDF files, which is indicative of a link farm or SEO manipulation tactic. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or distributing further malware. While no scripts were explicitly extracted, the PDF structure and numerous external links suggest an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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 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.
  • 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://ponafet.ru/wix?keyword=discovering+statistics+using+ibm+spss+statistics+pdf PDF link annotation
    • https://cdn.sqhk.co/pemoxeriko/Iapjahi/edh_tournament_rules.pdfIn PDF document text
    • https://jeketivogusu.weebly.com/uploads/1/3/1/3/131398097/piliriroxiwe_pufogikerawa_mibidelitibawex.pdfIn PDF document text
    • https://cdn.sqhk.co/wexunaveb/GgC3geO/97014761923.pdfIn PDF document text
    • https://tuzopukerokep.weebly.com/uploads/1/3/5/3/135347688/kusepuwoweru.pdfIn PDF document text
    • https://cdn.sqhk.co/dojopaxitovi/hyhcQSy/14019315239.pdfIn PDF document text
    • https://gotenalonas.weebly.com/uploads/1/3/4/3/134372716/pofasojanalitu.pdfIn PDF document text
    • https://cdn.sqhk.co/kovixileta/jfbcLgi/tubbo_minecraft_face.pdfIn PDF document text
    • https://mulokigapasol.weebly.com/uploads/1/3/1/0/131070847/loluvozedapefapegizu.pdfIn PDF document text
    • https://poxobavu.weebly.com/uploads/1/3/1/4/131453713/duwisiwefusulalik.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/wifiduxezo/wukutefutu.pdfIn PDF document text
    • https://s3.amazonaws.com/sesafefanulokam/tefifajijonep.pdfIn PDF document text
    • https://s3.amazonaws.com/jipowumat/general_expression_of_interest_letter_template.pdfIn PDF document text
    • https://s3.amazonaws.com/falevi/ruwumopozoka.pdfIn PDF document text
    • https://s3.amazonaws.com/davubewu/cranial_nerve_examination_osce.pdfIn PDF document text
    • https://s3.amazonaws.com/tapexiw/jadudisunovoxurojatak.pdfIn PDF document text
    • https://s3.amazonaws.com/nimuwet/durga_saptashati_path_vidhi_in_marathi.pdfIn PDF document text
    • https://s3.amazonaws.com/nisiwanolom/thickness_of_sheet_metal_gauges.pdfIn PDF document text
    • https://s3.amazonaws.com/savukojubusum/23195573966.pdfIn PDF document text
    • https://s3.amazonaws.com/vinejivunitego/zasogegemuxoxazi.pdfIn PDF document text
    • https://s3.amazonaws.com/tuxexi/42507560250.pdfIn PDF document text
    • https://s3.amazonaws.com/nijosinizo/walking_dead_comic_book_synopsis.pdfIn PDF document text
    • https://s3.amazonaws.com/mexavofezoxi/unclear_antecedent_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/baritexovopa/mortgage_calculator_excel_template_uk.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_off00010f4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F4E 5640 bytes
SHA-256: 27a2d8f91ec921c01c920df00ca9deacd46150481f4f4e20e527055bd8f719df
font_01_sfnt_off00012273.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12273 10884 bytes
SHA-256: 6481abafdabc6128c9209e6f6ec1951dea1c2923d2227abf7605fe9960c3d5ac

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