Malicious PDF — malware analysis report

Static analysis result for SHA-256 648021f20d1e40e5…

MALICIOUS

PDF

77.6 KB Created: 2021-04-27 20:43:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: d12c0214fd28de2925b2029977be8238 SHA-1: a824ef72bff6a2bfe51a13e1b788966c9936e23e SHA-256: 648021f20d1e40e5e3de5b028a6ab16df0dac9f4e4675bad29a7e35d03c31578
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, with one specifically identified as a link farm on disposable hosting, suggesting a phishing or redirection attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and numerous external links point towards an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://resalured.ru/strik?utm_term=personajes+principales+del+caballero+de+la+armadura+oxidada PDF link annotation
    • https://cdn.sqhk.co/worupageke/iPPQThc/video_boarding_schools_uk_sports.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367283/normal_60315f748cadf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421040/normal_60371fc20e117.pdfIn PDF document text
    • http://fowiwozatof.iblogger.org/habeas_corpus_writ.pdfIn PDF document text
    • https://tudimase.weebly.com/uploads/1/3/5/9/135985307/e2d0a55ae.pdfIn PDF document text
    • http://fibaxoxadomi.sportsontheweb.net/57365454228.pdfIn PDF document text
    • http://xekepova.iblogger.org/70548338612.pdfIn PDF document text
    • https://cdn.sqhk.co/baluwofuk/hepzjdS/wholesale_bingo_supplies_near_me.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4496153/normal_5fcaeb7961421.pdfIn PDF document text
    • http://sejapamuji.22web.org/frosty_the_snowman_piano_sheet.pdfIn PDF document text
    • http://novuzigekisev.iblogger.org/dusotegokigepewibakuv.pdfIn PDF document text
    • https://cdn.sqhk.co/zumufapofow/jfpgd7r/wwe_smackdown_live_blog_bleacher_report.pdfIn PDF document text
    • https://genunilime.weebly.com/uploads/1/3/4/3/134344847/kazudawonata_wuwojenuduworem.pdfIn PDF document text
    • http://tajizomekoza.iblogger.org/30601687249.pdfIn PDF document text
    • http://sakivometo.medianewsonline.com/40072781422.pdfIn PDF document text
    • http://budonap.iblogger.org/porsche_928_buyers_guide.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://furipurisebete.onlinewebshop.net/filmic_pro_manual.pdfIn PDF document text
    • http://nuzexev.epizy.com/gajatesufeb.pdfIn PDF document text
    • http://nelivizazepafo.epizy.com/bmtc_bus_pass_online_application_form_2019.pdfIn PDF document text
    • http://tipisane.epizy.com/32129008541.pdfIn PDF document text
    • http://bejitepirisobi.epizy.com/wordpress_guide_2019.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_off0000e194.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE194 5304 bytes
SHA-256: 4ebef1840f69c21620b828a6da67c0708a6c98c4b5bbf0cc86282e85765a8d84
font_01_sfnt_off0000f378.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF378 11332 bytes
SHA-256: 88f1c006f3660b5f9ab97ddd3dda186776bbf8ee12ba427faa64a0cc819d089d
font_02_sfnt_off00011874.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11874 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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