Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f207fa9e175cfd2…

MALICIOUS

PDF

75.6 KB Created: 2021-03-14 20:33:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 6c3bf0c45e5feb48a6c42928e65b6a1d SHA-1: 5de1b028ff5e8de9c23605e188d2b0f63c123b7e SHA-256: 9f207fa9e175cfd2d0ad36238826f9e8145704e17a2d0fe5efac699a2c86bf48
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable hosting, and a heuristic identified it as a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with malicious document lures.

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://nipisod.ru/strik?utm_term=what+is+the+code+for+borderline+diabetes+mellitus PDF link annotation
    • http://idealica-ufficialeitalia.website/xisetajesamupamuxuiysw.pdfIn PDF document text
    • https://cdn.sqhk.co/tawavumazo/ihJImKr/notafutanadevisudij.pdfIn PDF document text
    • https://cdn.sqhk.co/jizuxadif/fAoihgj/votux.pdfIn PDF document text
    • https://cdn.sqhk.co/lajawawinu/dgiTMjg/zombie_exodus_safe_haven_romance_madison.pdfIn PDF document text
    • https://cdn.sqhk.co/rasepotobami/aCnaB0y/21347779210.pdfIn PDF document text
    • http://vivadoctor.ru/11839473350qo3mk.pdfIn PDF document text
    • https://cdn.sqhk.co/gabamulijawe/hjgkd61/ranked_voting_system_vs_electoral_college.pdfIn PDF document text
    • http://qqkaxes.xyz/what_is_material_science5q1wm.pdfIn PDF document text
    • http://xorimomupajo.scienceontheweb.net/visagugeb.pdfIn PDF document text
    • https://cdn.sqhk.co/ridasozewe/v5eFjjK/edexcel_ial_chemistry_book_answers.pdfIn PDF document text
    • https://cdn.sqhk.co/moxoxitij/mghiaVv/kingdom_new_lands_unlock_dog.pdfIn PDF document text
    • https://cdn.sqhk.co/wifuponi/3iMDicm/86590947360.pdfIn PDF document text
    • https://cdn.sqhk.co/rijomawonuj/ccUNwgf/84123638323.pdfIn PDF document text
    • http://pasikufopubiwo.mypressonline.com/understanding_comics_chapter_5.pdfIn PDF document text
    • https://cdn.sqhk.co/sivefuxonix/idjiOgg/ice_cream_roll_up_place.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://mamuwudusaxu.epizy.com/machine_learning_books_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/962e2955-82ba-4663-b6b9-bcfd51426683/how_many_sight_words_should_a_2nd_grader_know.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7802b3d0-16ec-4b80-9fd9-4107413c6a39/jajekimuz.pdfIn PDF document text
    • http://kidexedobarali.rf.gd/great_ways_to_describe_the_sunflower.pdfIn PDF document text
    • http://sifuxugod.epizy.com/55663281518.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0a278ff0-6abd-4e2e-bce0-8510332033a7/how_many_new_covid_19_cases_in_georgia_today.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e97db3a9-1070-4f1f-802c-3f0c0442a555/gamibitefigovij.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_off0000e971.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE971 5416 bytes
SHA-256: c1fa3c1a78746441f581022856117ba16846e9e5366d47b26d4c76e62f6a3819
font_01_sfnt_off0000fbba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBBA 10912 bytes
SHA-256: 75e16ed7200fd7212cf2b51137705efc50c1dad0fae9880f924b31ff7a043feb

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