Malicious PDF — malware analysis report

Static analysis result for SHA-256 e98e20ccf6043290…

MALICIOUS

PDF

102.1 KB Created: 2021-03-19 22:48:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: cbdd2337b3e2af190e3251a292f34a65 SHA-1: 67ba61cfded77b5efdce188ca9d3b2ffaeb6fdd9 SHA-256: e98e20ccf6043290c98fe7f406ec16bbce4ca28a2536ca591dc2bf46f39e506b
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable or suspicious domains, indicating a link farm or phishing lure. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. The document body, though heavily obfuscated, contains metadata suggesting it's a crafted PDF, not a legitimate document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 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://ponafet.ru/award?keyword=il+barocco+storia+dell+arte+pdf PDF link annotation
    • http://tufidifegoz.66ghz.com/astm_a105_grade_b.pdfIn PDF document text
    • http://lastmarkt.ru/agnes_obel_citizen_of_glassnkl8q.pdfIn PDF document text
    • http://radogomi.mygamesonline.org/jesamuzurugujemapujunol.pdfIn PDF document text
    • http://uscreditinquiry.info/simplifying_equations_worksheet_ks33wwj7.pdfIn PDF document text
    • http://tevutubiwij.getenjoyment.net/how_much_did_things_cost_in_1988_uk.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4482403/normal_5ff42a5b75258.pdfIn PDF document text
    • https://lupunudarowujak.weebly.com/uploads/1/3/4/5/134599946/gidelare-vajetalokotezux-pomoxiwin.pdfIn PDF document text
    • http://mogimetekojubar.scienceontheweb.net/73436015846.pdfIn PDF document text
    • https://luwanolukurodo.weebly.com/uploads/1/3/5/3/135397368/domusuzuzunofan_salixowazerodoz_biwiku_wanawof.pdfIn PDF document text
    • http://cafechorsu.ru/fafatalubaboxefyle.pdfIn PDF document text
    • https://kotazadan.weebly.com/uploads/1/3/4/3/134349323/63d9692e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405193/normal_5fd27c458e845.pdfIn PDF document text
    • http://vumajufeboxidik.mywebcommunity.org/90425305916.pdfIn PDF document text
    • http://sokixatov.mywebcommunity.org/taxuxi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tuminexozuvino.atwebpages.com/xomusidutukuwamogex.pdfIn PDF document text
    • http://jepameji.rf.gd/danganronpa_2_class_trial_3_guide.pdfIn PDF document text
    • http://wolobugoxew.myartsonline.com/29977407837.pdfIn PDF document text
    • http://xulodolab.epizy.com/ek_waqia_batlata_hoon_naat.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_off00014e5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14E5B 5224 bytes
SHA-256: 53ee4992d229f904cd313ba0625a5533a137d36110d95420c02c5ebea2558fa6
font_01_sfnt_off00016025.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16025 13768 bytes
SHA-256: 120bfb6a975574a13543bbbd4ef30c38bf10ebdf6db0df59f5298c7e3f0b49b8

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