Malicious PDF — malware analysis report

Static analysis result for SHA-256 eab33437248a7fc5…

MALICIOUS

PDF

78.5 KB Created: 2021-03-05 08:27:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: d7db9568d6268588be930113265a30e3 SHA-1: 66177336fcd32fd3a5992f960a58bb7867eaf7d1 SHA-256: eab33437248a7fc58f0662e352292e736e68fade550e1931e14c51609ecf8665
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was identified as malicious by multiple heuristics and an ML classifier, with ClamAV detecting it as Pdf.Phishing.Trojan. The file contains a large number of external links pointing to other PDFs hosted on various domains, indicating a link farm or distribution mechanism. The presence of these links and the overall structure suggest an attempt to lure users to malicious content or manipulate search engine results.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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.
  • 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://soxebez.ru/123?utm_term=yardman+lawn+mower+oil+type PDF link annotation
    • http://xevusezes.medianewsonline.com/dias_feriados_en_usa_noviembre.pdfIn PDF document text
    • https://kuginipa.weebly.com/uploads/1/3/4/8/134853520/rexaweliluxelu.pdfIn PDF document text
    • https://pumaxodevuk.weebly.com/uploads/1/3/1/8/131872084/jesexunaxekoke.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4389603/normal_600771651daea.pdfIn PDF document text
    • http://juwupexutaval.mywebcommunity.org/zipijofokezatufak.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413004/normal_601159a02c66e.pdfIn PDF document text
    • http://kowojolajamuv.getenjoyment.net/attach_headboard_to_serta_adjustable_bed.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401518/normal_5fdbff78e3be6.pdfIn PDF document text
    • https://nikatomorufaxeg.weebly.com/uploads/1/3/1/4/131437252/safetugafiv.pdfIn PDF document text
    • http://kitafoged.medianewsonline.com/falkenstein_castle_texas_wedding.pdfIn PDF document text
    • http://mitutepoka.medianewsonline.com/fipopuvenavigutasedalod.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4530712/normal_5fe48850a4163.pdfIn PDF document text
    • http://rowowesofazov.medianewsonline.com/libro_el_poder_de_la_palabra_gratis.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367299/normal_5fdf74271f3c2.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://fejusudoboriduf.rf.gd/21717858280.pdfIn PDF document text
    • https://f2d828cf-06d9-46ea-85af-d88b0bc20d44.filesusr.com/ugd/501a20_e8f2257cef5042a49b11615eb08b17bf.pdf?index=trueIn PDF document text
    • https://f499a9ea-5579-4d3c-a180-ba191067f9b7.filesusr.com/ugd/34ec99_22eb69662fe645dc9d5f708800d74958.pdf?index=trueIn PDF document text
    • https://06ebba1c-c738-45d4-b58d-83edbdcc9420.filesusr.com/ugd/b14caa_c2dccc7f30f44819b0c9e50a2e3521cd.pdf?index=trueIn PDF document text
    • http://lizilozenoz.epizy.com/pebanal.pdfIn PDF document text
    • http://desejole.myartsonline.com/67690659517.pdfIn PDF document text
    • http://viwukapatajomi.rf.gd/used_garmin_220_tracking_system_for_sale.pdfIn PDF document text
    • https://00407fa8-a9ef-4b78-9bbe-46147fc8acf6.filesusr.com/ugd/5ecadc_bdb28386956a46ce9cbac787288608ce.pdf?index=trueIn PDF document text
    • http://bigofufujenu.epizy.com/2921846094.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_off0000e9fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9FB 4872 bytes
SHA-256: b80aae68df2eb38cb4c3e3a8a7febfb0ac84bac99d546c64726d31288f49428f
font_01_sfnt_off0000fa7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA7E 10540 bytes
SHA-256: d6c2ccb24c376cc9ca9705d341de59a9c153dace216daba1b7e3f13c07b77158
font_02_sfnt_off00011e4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E4B 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378