Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c62422c3e1b9b09…

MALICIOUS

PDF

76.6 KB Created: 2021-03-01 19:55:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 2d0c44e5cc5d97696f4ec3524189b7c6 SHA-1: 08b6de824100c6ee5a43332d5e29746778f8b858 SHA-256: 6c62422c3e1b9b0997a4c85bbc60302036f705b8430077ab53bc61e8ac28b5f3
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many hosted on disposable domains, indicating a link farm or SEO manipulation tactic. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and numerous external URIs point towards a malicious document designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://baarspo.ru/strik?utm_term=g+shock+mudman+military+green PDF link annotation
    • http://zabolojisag.getenjoyment.net/nosler_130_rdf_6.5_creedmoor_load_data.pdfIn PDF document text
    • https://totuseki.weebly.com/uploads/1/3/5/3/135322554/kezujoxo-webufuwulep-metupefodexelux-datugubo.pdfIn PDF document text
    • https://cdn.sqhk.co/jogekiluse/quja2gj/pivaxefojarufemiv.pdfIn PDF document text
    • https://gidiwukos.weebly.com/uploads/1/3/1/3/131381706/lopujamawavor_polegu_jafejobat_baritekapi.pdfIn PDF document text
    • https://cdn.sqhk.co/gilubibawi/hd2gfhh/state_parks_with_cabins_near_jackson_ms.pdfIn PDF document text
    • http://ganitigusawev.mygamesonline.org/vicks_vaporizer_walmart.pdfIn PDF document text
    • https://cdn.sqhk.co/wodaximewule/aje7jif/naponekudenerodusalakuxer.pdfIn PDF document text
    • https://nimivumunekal.weebly.com/uploads/1/3/3/9/133999229/guniji_nerajesuraxo_kubejopuzogixi.pdfIn PDF document text
    • https://cdn.sqhk.co/sofilita/1zjejic/history_of_islam_religion_in_bangla.pdfIn PDF document text
    • https://wefupavoxed.weebly.com/uploads/1/3/2/6/132682659/a2c7cd02e100.pdfIn PDF document text
    • http://nusowutevu.getenjoyment.net/42502516827.pdfIn PDF document text
    • https://zewabezasakaru.weebly.com/uploads/1/3/4/5/134593707/tatotujarapaje_kepizofunidejab.pdfIn PDF document text
    • https://lobovalosidim.weebly.com/uploads/1/3/1/4/131437181/a1e7a.pdfIn PDF document text
    • https://buputulu.weebly.com/uploads/1/3/0/7/130738697/jovibazabamubewo.pdfIn PDF document text
    • https://zomujowedava.weebly.com/uploads/1/3/4/6/134629266/2495480.pdfIn PDF document text
    • http://jekefidaz.mygamesonline.org/how_long_does_wonder_week_leap_10_last.pdfIn PDF document text
    • https://cdn.sqhk.co/miwavilusaji/hidxjfc/juegos_de_orn._io.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/lanorolowu/42742312987.pdfIn PDF document text
    • https://s3.amazonaws.com/tutapaxi/xugidololinamibo.pdfIn PDF document text
    • https://s3.amazonaws.com/voropa/health_information_technology_jobs_near_me.pdfIn PDF document text
    • https://s3.amazonaws.com/niwotipugonuvoz/dabelara.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_off0000eda8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDA8 5548 bytes
SHA-256: 02efc4ba96cb51b13e5a61bacca41834a82a42918d50bf07db7a7441dee4eb70
font_01_sfnt_off00010066.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10066 10804 bytes
SHA-256: c035f59e445fc0869de9355dc3a4e51da441f7eb83552a88ab86486a1b09f29d