Malicious PDF — malware analysis report

Static analysis result for SHA-256 0734d270bc57a74e…

MALICIOUS

PDF

79.0 KB Created: 2021-03-19 05:37:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 3a268c985c5bea09687101f59ce3a79d SHA-1: b13a2d4a570312909ddc31f3510702b1e8e4e426 SHA-256: 0734d270bc57a74e3bc294637f7af1425cdaa16833cdea1e2a081f9551f55260
126 Risk Score

Malware Insights

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

The PDF is flagged as malicious by ML classifiers and ClamAV, and contains numerous embedded URLs. One prominent URL, 'https://mezovuduw.ru/strik?utm_term=data+structures+interview+questions+and+answers+for+freshers+pdf+free+download', suggests a phishing lure related to job interview preparation. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates the PDF is designed to host multiple links on disposable domains, further supporting a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://mezovuduw.ru/strik?utm_term=data+structures+interview+questions+and+answers+for+freshers+pdf+free+download PDF link annotation
    • http://www19216801.site/writing_and_delivering_an_informative_speechp4e76.pdfIn PDF document text
    • http://pevurupijovuzut.22web.org/xozutapeku.pdfIn PDF document text
    • http://betagirut.iblogger.org/fufidotaba.pdfIn PDF document text
    • http://pubggaming.online/how_do_i_setup_my_panasonic_dect_6.0_answering_machinec40gj.pdfIn PDF document text
    • http://bet-info.ru/dbx_160a_vs_160xtjiroi.pdfIn PDF document text
    • http://paktum.pro/engineering_drawing_n2_textbook_free_downloaddoqlc.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://dawubiri.rf.gd/dajebileluxijudimovaxurop.pdfIn PDF document text
    • http://kefixofelapadi.epizy.com/whatsapp_video_call_ipad.pdfIn PDF document text
    • http://bagitokukuwulo.epizy.com/ceneval_guia.pdfIn PDF document text
    • https://4c72699b-aa2e-4dc8-8bd5-1a54e8f938a6.filesusr.com/ugd/f3cb45_7f3ae114b3cb47de9082f45c7584ce7f.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/71831ed9-826c-4f26-9625-b31e3d1238b4/14547692273.pdfIn PDF document text
    • https://52b03d57-94e3-497b-b2ee-5a576b8f136c.filesusr.com/ugd/67ae49_86eb6a6dbe0c4301befeb1bcfb5bc9fa.pdf?index=trueIn PDF document text
    • https://5e446c31-fcb6-4427-a178-91ee45bbff8b.filesusr.com/ugd/4e76b8_e5473c17b7094ee48a33543ac96b0053.pdf?index=trueIn PDF document text
    • https://07e0a16e-b77d-475b-b724-88bbaedb347c.filesusr.com/ugd/8e9e2f_45be093ca1be423083b6d841bbf4a420.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/9be0886a-9b36-4210-8deb-c4738e0b3f8a/47931639120.pdfIn PDF document text
    • http://ruludamena.epizy.com/agriculture_books_in_urdu.pdfIn PDF document text
    • http://jerekapubujiw.rf.gd/sakubujuritumewazed.pdfIn PDF document text
    • https://6c639bf1-704a-4500-b661-329758898742.filesusr.com/ugd/02d620_4dbdfaf24059411c8e805440944f9f8f.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/8871161a-f07d-4306-aa1f-bd348aa1cba9/37253214417.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ea08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA08 5400 bytes
SHA-256: d893eb7c010fd99b9d852912a428a8340edbc802f24d5a3c9fb2c752fed9f4ac
font_01_sfnt_off0000fc70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC70 10660 bytes
SHA-256: 0353083479ef16c910004eb80216cc32cac2ab8889e26ab1f10c1d36eada968e
font_02_sfnt_off000120ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120BA 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

Open this report in the interactive analyzer, or submit your own file for analysis.