Malicious PDF — malware analysis report

Static analysis result for SHA-256 f4144ab215c25465…

MALICIOUS

PDF

78.1 KB Created: 2021-03-06 20:25:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: c448d68a81b2acd224ecb3d2654bb201 SHA-1: 9c280b9e28ea468f79f1513ee5ab538c767e82f8 SHA-256: f4144ab215c25465f68b14f37e61d568f57bef1805cebaeeda9e1f7cdc34205e
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://dugedepap.ru/strik?utm_term=which+is+better+kitchenaid+or+whirlpool PDF link annotation
    • https://nitikado.weebly.com/uploads/1/3/4/6/134660078/luvalek.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410217/normal_601ae999088b7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417813/normal_600eea25f2ce2.pdfIn PDF document text
    • http://kebenoda.scienceontheweb.net/homelite_3100_psi_pressure_washer_honda.pdfIn PDF document text
    • https://deriwofapavuz.weebly.com/uploads/1/3/4/3/134311795/1228604.pdfIn PDF document text
    • http://rankingcoach-seo.com/jixometelelanamemkktv5.pdfIn PDF document text
    • http://wimuzawoxi.getenjoyment.net/73940351187.pdfIn PDF document text
    • https://patewowuxafopon.weebly.com/uploads/1/3/4/5/134595548/sinonus.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447250/normal_6002e84c9baaf.pdfIn PDF document text
    • http://wonder-ita.space/jatoragarebe0ee.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4469837/normal_5fed2c2935c5e.pdfIn PDF document text
    • https://bogobesupagal.weebly.com/uploads/1/3/0/7/130775478/sogawuzatirem.pdfIn PDF document text
    • http://wisatemubudu.medianewsonline.com/kali_linux_revealed_mastering_the_penetration_testing_distribution_paperback.pdfIn PDF document text
    • http://boomua.site/best_100_pop_songs_2018yhbkr.pdfIn PDF document text
    • http://acupofjacob.com/nys_dmv_practice_test_for_cdlyk32h.pdfIn PDF document text
    • https://razomidubijime.weebly.com/uploads/1/3/4/3/134395635/b85a52.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/kalanejaxutilif/meliligepud.pdfIn PDF document text
    • http://geforagegi.atwebpages.com/16799055104.pdfIn PDF document text
    • https://s3.amazonaws.com/sajatofubote/didipifanifikatorajo.pdfIn PDF document text
    • http://raxajabidadida.onlinewebshop.net/pokubuxab.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/53ad8c8f-7ccb-4129-ae85-7cc28555f753/tojoxezepup.pdfIn PDF document text
    • https://s3.amazonaws.com/winumigutam/storyboard_file.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/71bad130-4c28-48de-8e0a-185e2f014a9d/competencias_para_la_vida_plan_de_estudios_2011.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/33124832-8823-457b-8567-fb5f488148ce/80808966171.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_off0000f25f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF25F 5468 bytes
SHA-256: 3af2f2b3e0da584f2efde683e8cc2a4518400a5ba98f1adf6cb8a448763f5f99
font_01_sfnt_off00010507.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10507 11212 bytes
SHA-256: 6bc261d35771f14e000449a477756852f4bf857fa5464684fac100e831c77faa