Malicious PDF — malware analysis report

Static analysis result for SHA-256 601d2e6f3abb5596…

MALICIOUS

PDF

78.0 KB Created: 2021-03-04 02:36:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: 9df98e64baa7c568d3ee6b26ab410396 SHA-1: de80fe2b8ab5c830b064dd9976f99de153f354b6 SHA-256: 601d2e6f3abb5596f2d3c218a757d386499f835d37f30f00caf19d146d71a448
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, with one prominent URL pointing to a domain associated with phishing and link farming. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to redirect the user to a malicious site, potentially for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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=less+than+zero+movie+theme+song PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4457847/normal_601af4ab36299.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388181/normal_5ff145e09e4d1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368984/normal_5fda7b8713970.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414169/normal_5fcb09248918c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470399/normal_5fd2859727b44.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417675/normal_601c966061675.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450519/normal_601a0079e34d7.pdfIn PDF document text
    • http://wirodapupoz.iblogger.org/android_room_database_tutorial.pdfIn PDF document text
    • http://nakozek.mypressonline.com/fomofosafulixunisawewud.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455376/normal_5fda71df017f5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423148/normal_603cbec9dcd14.pdfIn PDF document text
    • http://aov.one/how_to_setup_dd_wrt_as_a_repeater_bridgea8txf.pdfIn PDF document text
    • http://graatorama.space/teserinig68b21.pdfIn PDF document text
    • http://heartcenteredequestrian.com/896790572722xkzt.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kobepok.epizy.com/21077493366.pdfIn PDF document text
    • http://benamow.myartsonline.com/jamebeviwab.pdfIn PDF document text
    • http://suxikikafib.epizy.com/best_manual_espresso_machine_2019.pdfIn PDF document text
    • http://gumigojozupe.epizy.com/bozovewetapawut.pdfIn PDF document text
    • http://jimogorop.rf.gd/how_to_put_the_filter_back_in_the_keurig.pdfIn PDF document text
    • http://fenubamijub.epizy.com/bumblebee_car_wallpaper.pdfIn PDF document text
    • http://jasigobup.epizy.com/footing_design_excel_sheet.pdfIn PDF document text
    • http://webubekesivamuf.epizy.com/gefoturoluwawagipovimotig.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_off0000f2b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2B5 5120 bytes
SHA-256: 505e076d6bc59231bb99b4b1b1975127df153f9228ef7ee5b65ccdda3e6d6049
font_01_sfnt_off0001040c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1040C 11336 bytes
SHA-256: 66537970a77bcc21ee9e21fa2cc9547abed8cddd623bd9d73634a79e8b3a93f2

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