Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a7ae922916f2bf1…

MALICIOUS

PDF

71.5 KB Created: 2021-03-19 21:28:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: d6cf5c277dffd752dec6f59c15b041ff SHA-1: d29f92134f57a8c9a61edff0b804b643056eab11 SHA-256: 9a7ae922916f2bf192e8defd17b0f1c2469f26e2a3ffa5234559dbb1ba5b06d3
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 detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains multiple embedded URLs, with one prominent URL pointing to 'vilenefex.ru' and another to 'gazinukonap.iblogger.org', suggesting these are likely malicious destinations. The document body, though heavily obfuscated, contains product-related keywords, indicating a lure to encourage user interaction with the embedded links.

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://vilenefex.ru/strik?utm_term=delonghi+livenza+convection+oven+with+triplepro+surround+cooking+and+2+racks PDF link annotation
    • http://gazinukonap.iblogger.org/42107997951.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4456687/normal_5ffbf046be2e7.pdfIn PDF document text
    • http://cashthe.ru/color_theory_emotions_chartayr00.pdfIn PDF document text
    • http://vorgazme.com/hey_whipple_squeeze_this_5th_editiontbyut.pdfIn PDF document text
    • http://italiabeach.space/el_pollo_loco_chicken_nutrition_informationwvhwn.pdfIn PDF document text
    • http://trells.space/what_are_the_key_elements_of_protocolsoi8g7.pdfIn PDF document text
    • http://xarusogu.22web.org/tavufugawejelal.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480582/normal_603c35fc7b265.pdfIn PDF document text
    • https://nedijevir.weebly.com/uploads/1/3/1/4/131406348/189828.pdfIn PDF document text
    • https://wezisewego.weebly.com/uploads/1/3/5/3/135342704/jubekiba.pdfIn PDF document text
    • http://tojenan.iblogger.org/what_remote_jobs_pay_well.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://8767aa75-4bd5-48c0-94ca-24e983238001.filesusr.com/ugd/debdc1_523301f7667148658edbba1f2e612112.pdf?index=trueIn PDF document text
    • http://mifisabewup.epizy.com/goodwill_in_spanish_language.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ed9a4d53-f1f8-478b-af40-c1737d84abc8/hp_elitebook_2740p_user_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/abd2e532-a289-4e70-b433-383d5e27a8ba/tiwukebatodapeka.pdfIn PDF document text
    • https://e82ff0bd-cb1a-4782-8b92-0a0fb7657660.filesusr.com/ugd/d17951_13a9e1f59b0b45f682ba7dfbb57eedd3.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/3b7e00ac-8308-4360-be8c-8e26bc44a420/un_curso_de_milagros_leccion_158.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/beb305e1-53fb-4ffc-915d-989feebc8771/fejuzatowedilemexu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c1899f20-8987-4c89-a472-f760c3b46fa4/daily_bible_study_guide.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_off0000d7b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7B1 5732 bytes
SHA-256: 71620d968d6a87fe3e548dbe8d9bcb77d943be11141133b5d23efda01a20bfde
font_01_sfnt_off0000eb4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB4A 10896 bytes
SHA-256: 9406a4897eb9d0aa5b920b6a006d01264bc026854812fbfc874699c6aa4ef167

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