Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c95c5499426411e…

MALICIOUS

PDF

79.4 KB Created: 2021-04-04 08:46:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 2922a65133d66927e435f7356fb40cb4 SHA-1: b79de3efa5351de162f1834d6d3197a9ba1fc7f1 SHA-256: 3c95c5499426411e622395b6eff493e3a3190f1e4739a4dd595470ed3df4f8f9
126 Risk Score

Malware Insights

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

The PDF document was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, suggesting it functions as a link farm or phishing lure. The presence of 'blood in dog bowls' in the document body, combined with the extensive list of external links, points towards a deceptive tactic to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://seumenha.ru/strik?utm_term=blood+in+dog+bowls PDF link annotation
    • https://cdn.sqhk.co/giganopof/fcLVcgd/sigora.pdfIn PDF document text
    • http://ravigimojamel.mypressonline.com/xikizima.pdfIn PDF document text
    • https://cdn.sqhk.co/ximirujusuxo/dvdjaD1/buwubep.pdfIn PDF document text
    • http://repair-foto.ru/kowovuwuvinowo3dun.pdfIn PDF document text
    • http://dadevizevarek.scienceontheweb.net/radekowoboridovega.pdfIn PDF document text
    • http://ritixibetono.mygamesonline.org/cover_letter_sample_file.pdfIn PDF document text
    • http://bu-markett.com/33438242614sq7a5.pdfIn PDF document text
    • http://korogesubelokut.mypressonline.com/neumonia_sintomas.pdfIn PDF document text
    • http://depusapo.mypressonline.com/dakisanipureruvunutemuza.pdfIn PDF document text
    • http://trynutra.shop/pilot_g2_10_pens_office_depot5gn76.pdfIn PDF document text
    • https://cdn.sqhk.co/dewufidabo/mXXij1A/kejof.pdfIn PDF document text
    • http://memimusisat.getenjoyment.net/exercicios_capacitores.pdfIn PDF document text
    • https://cdn.sqhk.co/lasesekov/Ggjkhex/guided_readers_and_writers_fountas_and_pinnell.pdfIn PDF document text
    • https://cdn.sqhk.co/zugeketinog/4WQPKsF/rukivenoliniwaxezonixofu.pdfIn PDF document text
    • https://cdn.sqhk.co/wotinobeb/hjXESNa/gugapu.pdfIn PDF document text
    • http://rejemezurufoveg.mywebcommunity.org/how_to_end_a_restaurant_review_essay.pdfIn PDF document text
    • http://nogurufegu.mygamesonline.org/possessive_apostrophe_worksheet_with_answers.pdfIn PDF document text
    • http://fullhp.info/ohio_university_campus_mapah42n.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gitodake.myartsonline.com/bagenuwulatirakobulilet.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_off0000fb9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB9D 4968 bytes
SHA-256: a04440246b26559ee0a658bf96e368521b33e241613d6abfae9064300f2a6c91
font_01_sfnt_off00010caf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CAF 10648 bytes
SHA-256: a1bac7e508a638ad1f7110fa56accaaf2bc8224e78462588ce66245842cbc5bf

Open this report in the interactive analyzer, or submit your own file for analysis.