Malicious PDF — malware analysis report

Static analysis result for SHA-256 509e60cc18c36828…

MALICIOUS

PDF

76.4 KB Created: 2021-05-07 02:09:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: ce855409d7aa5b83bfa5fe385117a9c2 SHA-1: 498a830b3f1d2c8c8707e8be9937b4e5dcf6d84c SHA-256: 509e60cc18c368287d3b0f170ec1b2cf862abf486e908315c36b11df2bee87d0
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged by ClamAV as 'Pdf.Phishing.Trojan' and an ML classifier indicated a high probability of maliciousness. The embedded URL 'https://zajinet.ru/strik?utm_term=scan+to+computer+from+hp+printer' appears to be a phishing or malware distribution point, and the document's structure suggests it's a link farm designed to obscure the final destination. No scripts were extracted, but the overall context points to a phishing or downloader attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://zajinet.ru/strik?utm_term=scan+to+computer+from+hp+printer PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4379601/normal_5fcd1048ebc1d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490274/normal_60645a41b2db3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407749/normal_605be74e79ece.pdfIn PDF document text
    • http://witefuxav.22web.org/unable_to_connect_to_mks_error_in_vsphere_web_client.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451039/normal_6014244f22108.pdfIn PDF document text
    • http://potoborotagivud.22web.org/xavajoboxuvamosolafenu.pdfIn PDF document text
    • http://fovekodabogad.iblogger.org/the_dead_sea_scrolls_translated.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445743/normal_600a3e5420945.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://601bead5-a720-4f65-98db-62fe2a42cb91.filesusr.com/ugd/0e52b4_ae5fbec918f44694a866e7780f6c243f.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/ad0180fc-4cb3-44d8-9976-d0180919dbf5/how_to_read_ruler_measurements_in_cm.pdfIn PDF document text
    • http://bonufew.epizy.com/vuxosaze.pdfIn PDF document text
    • http://ruzuvune.epizy.com/bogisoxefawese.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f03152a0-10ad-4def-813b-e7356478f449/44210902274.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/04cbf24b-6f98-403d-beda-0fd6517a8404/cuanto_es_100_gr_de_azucar_en_tazas.pdfIn PDF document text
    • https://a2ae8793-a99f-480d-a3bc-849ef63d34f7.filesusr.com/ugd/cc207a_8954b5def8834113a891b1fe6e994f23.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/17eaaa77-d937-4a6b-b75e-b2664b4eb7af/resumen_corto_de_la_obra_aves_sin_nido_de_clorinda_matto_de_turner.pdfIn PDF document text
    • http://xikapewegoruzom.epizy.com/50704531367.pdfIn PDF document text
    • http://vijesir.rf.gd/81045932839.pdfIn PDF document text
    • http://fukurem.epizy.com/32287851953.pdfIn PDF document text
    • https://933527c5-e005-4225-a3aa-05fee46c7696.filesusr.com/ugd/b51dd5_410e62bbed2343e0a6edb904073eb600.pdf?index=trueIn PDF document text
    • http://sapataxetawot.epizy.com/zuziginotuzube.pdfIn PDF document text
    • https://78905da9-dd21-4190-abaa-c894c042e703.filesusr.com/ugd/851c7c_07a1b736f20f47fd97105cfb2647beff.pdf?index=trueIn PDF document text
    • https://b73b9701-b1df-43be-b031-73419f87697c.filesusr.com/ugd/bfbd96_a6cbe3260c15490186a9991b550ee412.pdf?index=trueIn PDF document text
    • http://gidozowelixije.rf.gd/food_and_beverage_manager_resume.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/35834321-5896-4e88-a082-17bf64a8d5c4/91470597813.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_off0000ed47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED47 5148 bytes
SHA-256: 5590c17cfc7cf6b6bf2f53c2761004b9aac74b48b715ba6d79336c14d861af8f
font_01_sfnt_off0000fea7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEA7 10904 bytes
SHA-256: 2fced3049fea145c16c311b314641c9febf31edc000cfa346a1492ba68fdc751

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