Malicious PDF — malware analysis report

Static analysis result for SHA-256 583274c56a1e29dd…

MALICIOUS

PDF

121.3 KB Created: 2021-05-29 14:51:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13
MD5: a713b776a9c23d886ea4a7f2094fc9c1 SHA-1: 52b0268df369b34362b1a03cf2a9d42c65e26e7e SHA-256: 583274c56a1e29ddcba88dfdd65de10e53154017ef542c7088144518d3dda6c9
186 Risk Score

Malware Insights

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

This PDF file contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to distribute malware or facilitate phishing. The presence of a URL pointing to 'hoyle casino games 2012 crack' indicates a lure for pirated software. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://jacksth.ru/strik?utm_term=hoyle+casino+games+2012+crack PDF link annotation
    • https://guginolorenoba.weebly.com/uploads/1/3/4/7/134722040/jesogagagitu-detoze.pdfIn PDF document text
    • https://jurulekoteg.weebly.com/uploads/1/3/4/7/134700509/6efacdf9.pdfIn PDF document text
    • https://jilazokezabise.weebly.com/uploads/1/3/5/2/135296918/modavaxofogalurab.pdfIn PDF document text
    • https://xovawezovikax.weebly.com/uploads/1/3/0/9/130969403/437e6603.pdfIn PDF document text
    • https://bopevifobomamak.weebly.com/uploads/1/3/0/8/130814579/naduluxadizabina.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475874/normal_60651bb57634c.pdfIn PDF document text
    • https://witowufagefalob.weebly.com/uploads/1/3/0/7/130738848/6450816.pdfIn PDF document text
    • https://bilezezewi.weebly.com/uploads/1/3/4/6/134626203/1030652.pdfIn PDF document text
    • https://nulevilisibonu.weebly.com/uploads/1/3/4/5/134585613/luxoxakib.pdfIn PDF document text
    • https://jinunogafexaxim.weebly.com/uploads/1/3/4/8/134884933/3703916.pdfIn PDF document text
    • https://fitepavi.weebly.com/uploads/1/3/4/4/134485464/c942033.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407989/normal_60464aab84764.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379970/normal_5febefd7210dc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454438/normal_60506db6f2991.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365624/normal_5ffed1e711211.pdfIn PDF document text
    • https://zosafetudosejo.weebly.com/uploads/1/3/4/6/134670517/6217437.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/7cc42f49-5e8b-4315-b342-420f8852ade9/maradetazojurejedanorit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/518ed4d6-d652-469e-aff0-01b94b8207f4/92974258623.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f99a00c6-367f-4518-9e73-3949c761e510/boy_scouts_tree_sale_near_me.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00018414.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18414 5572 bytes
SHA-256: 88bc5c2950a24c7f8c52f757adca3c09bc2d92cb64a3b7c867e9f75ba46e57a5
font_01_sfnt_off00019703.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19703 12588 bytes
SHA-256: dc40c72dd7535b029324a4fdff46c520e54d9e53145d7f55310cd83ce420a83d
font_02_sfnt_off0001c103.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C103 16192 bytes
SHA-256: 1ff76b967cdf3bc4238cb8097aa9d4755c8fb5bd66c4cf01391f6e70ad1e9315