Malicious PDF — malware analysis report

Static analysis result for SHA-256 dded59c8e4698008…

MALICIOUS

PDF

120.0 KB Created: 2021-03-24 05:45:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 8f5237428393cc862a3f1c708fa87d77 SHA-1: a6914bb88b33e41c08d6fd8daf3670e80f94cc2e SHA-256: dded59c8e46980085b93c0afee951179d0b72016be26f8bad7794da8ea8f34b6
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a link farm. It contains numerous external links, many pointing to disposable domains, suggesting an attempt to manipulate search engine results or distribute further malicious content. While no scripts were explicitly extracted, the PDF structure and embedded URLs indicate a phishing or content distribution vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://lozipotod.ru/award?keyword=anterograde+tomorrow+pdf+espa%25C3%25B1ol PDF link annotation
    • http://roserubusigiwij.mywebcommunity.org/finger_phonics_big_book.pdfIn PDF document text
    • https://duzesoduvumasu.weebly.com/uploads/1/3/4/1/134131570/siwezinezu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4464542/normal_5feb1cb47c5a4.pdfIn PDF document text
    • https://dujezipiver.weebly.com/uploads/1/3/4/6/134610991/c6d3913.pdfIn PDF document text
    • http://jalosus.mygamesonline.org/building_design_file.pdfIn PDF document text
    • http://dololebajug.scienceontheweb.net/4457306057.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4392463/normal_5fcb1810ba858.pdfIn PDF document text
    • https://rajagoka.weebly.com/uploads/1/3/1/4/131406288/zinulu.pdfIn PDF document text
    • https://wuripofowiwafu.weebly.com/uploads/1/3/4/3/134332549/2cc7cca8f183.pdfIn PDF document text
    • https://zabaparadasikid.weebly.com/uploads/1/3/4/3/134317604/208f2d1fe.pdfIn PDF document text
    • https://werobezukivipa.weebly.com/uploads/1/3/4/3/134337965/votapilotasivo_fefijatu.pdfIn PDF document text
    • https://boretenewur.weebly.com/uploads/1/3/1/4/131453221/lubamina.pdfIn PDF document text
    • https://kawolusasemosu.weebly.com/uploads/1/3/5/3/135397741/7682062.pdfIn PDF document text
    • https://nedalejurozawo.weebly.com/uploads/1/3/0/7/130776692/82f54d80.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
    • https://uploads.strikinglycdn.com/files/4770a90c-b246-4006-a551-2f2faf0b115a/how_to_detect_carbon_monoxide_without_detector.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6d512ceb-a620-4b32-8328-da75af572ba2/95302622802.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/50f27743-3bbf-4d5c-a1df-a9f5900918db/razor_e200_battery_charger.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/037b015d-cc93-4557-8a44-19fb11430419/tufiliguwamajulomaj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/738729d6-2f27-467d-8c2d-fec319a450ea/why_does_my_tv_have_no_sound_or_picture.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0d399f3e-75ad-4d69-9313-849581e6daed/does_lg_make_sound_bars.pdfIn PDF document text
    • http://koxolavomuzo.myartsonline.com/72198627940.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0dbcd1ce-6cfc-4b4b-add2-6f4ad1149989/dunkin_donuts_frozen_coffee_calories_large.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6e418d68-7c80-4795-9e50-03545e01d6bc/9030785313.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_off000189ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x189CE 5396 bytes
SHA-256: 54601e39e70ef01a4e44cb8a6e47769eea4375910c0f54bdd69960336acf76b2
font_01_sfnt_off00019be0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19BE0 11632 bytes
SHA-256: a6a3e25abde5fae9d143d586a4ea388a5c5eaf75e6babf6cae0372c8b462e65e
font_02_sfnt_off0001c1d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C1D3 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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