Malicious PDF — malware analysis report

Static analysis result for SHA-256 e885edb2b218da7e…

MALICIOUS

PDF

81.0 KB Created: 2021-03-30 15:50:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 2182f37bd27ddf7f51a7f7e90b43d80f SHA-1: d679a2a109000f7c1a37ac290995f765b20aa28b SHA-256: e885edb2b218da7e219666270f750d53d4e74072a9cd3260fd565334ccd0d6c5
126 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV. It contains numerous embedded URLs, many pointing to disposable domains, suggesting a link farm designed to redirect users to malicious sites. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic indicates a high likelihood of this being a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://xajibur.ru/strik?utm_term=transmisi+multicast+pada+jaringan+local+area+network+atau+lan+adalah PDF link annotation
    • http://vozajomaralamer.mygamesonline.org/ancova_example.pdfIn PDF document text
    • http://pinezotamex.getenjoyment.net/agostinho_de_hipona_em.pdfIn PDF document text
    • https://rapovadok.weebly.com/uploads/1/3/4/7/134705404/8570054.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4482189/normal_5ff7cc117f1e8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369905/normal_5ff90055aece2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384299/normal_60590cdf4610b.pdfIn PDF document text
    • http://sakulog.sportsontheweb.net/94494080905.pdfIn PDF document text
    • https://zijananuwale.weebly.com/uploads/1/3/4/4/134438714/1163ed68b8e5b2.pdfIn PDF document text
    • https://nexudusuje.weebly.com/uploads/1/3/0/7/130740550/e21cebd42.pdfIn PDF document text
    • http://miwewumexurigan.sportsontheweb.net/libros_para_aprender_frances_desde_cero_gratis.pdfIn PDF document text
    • http://xutexukoxobofi.mywebcommunity.org/vezixebosevesubiga.pdfIn PDF document text
    • https://saniluje.weebly.com/uploads/1/3/4/3/134323688/misesufifagax-bepoj-dazajalijuba.pdfIn PDF document text
    • https://sojenumodab.weebly.com/uploads/1/3/5/2/135296615/kuzetikef.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420764/normal_5fdd940fdbc52.pdfIn PDF document text
    • http://tiwimifozukimu.medianewsonline.com/15557529322.pdfIn PDF document text
    • https://wudujadulaneg.weebly.com/uploads/1/3/0/7/130738887/vanex.pdfIn PDF document text
    • https://tolixolosunep.weebly.com/uploads/1/3/4/4/134403343/683c07518398.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/e53bc33c-e590-4485-a6e8-defcad250d60/22183157944.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d01a36cb-081b-40fa-9abc-0dc078816f33/how_do_i_write_an_application_letter_for_a_nursery_teacher.pdfIn PDF document text
    • http://tobidogajetu.onlinewebshop.net/27316478852.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/67e9a08f-afc1-43b8-a0de-8e21dbd6ba3b/79723020494.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7b45db69-673f-4a4f-980a-6e6c47744297/data_management_techniques_definition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9d62ed7b-ef7f-4dbe-b5b1-8cbb14555f9a/como_hacer_una_corona_de_adviento_2020.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_off0001001a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1001A 5668 bytes
SHA-256: 9872e13fed18da994293f0a7de9f08707f302f74357bbab633ce10d8284afb41
font_01_sfnt_off0001134c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1134C 10124 bytes
SHA-256: 89e93962b98410a9f931cdff0f98fb13bdf1f66b8b2843cdd63eb72e77d7866f

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