Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c21003afebe7299…

MALICIOUS

PDF

81.0 KB Created: 2021-04-20 20:05:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 361868ee154b2b17d585a0745f2b5280 SHA-1: de2fcd4e7e10f75cee4b05e1807c04e5d2322fac SHA-256: 1c21003afebe729962ba30afc20a392bb13b423cccc61f61fdb473b3101cfdc2
126 Risk Score

Malware Insights

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

The PDF document was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, many pointing to disposable domains, suggesting a link farm or phishing lure. The presence of external URI heuristics and the ML_NYX_PDF_MALICIOUS firing strongly support the classification as a malicious PDF designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://jumiwimov.ru/strik?utm_term=el+se%25C3%25B1or+de+las+moscas+pdf+ingles PDF link annotation
    • http://rewita.fun/how_to_test_cyberpower_ups_batterypq93z.pdfIn PDF document text
    • https://noduxulab.weebly.com/uploads/1/3/4/9/134901810/0dcb566f1c.pdfIn PDF document text
    • https://nugilura.weebly.com/uploads/1/3/5/3/135317706/sevud-dulakasenokuj.pdfIn PDF document text
    • https://cdn.sqhk.co/denidugabuni/thigdib/book_maker_android_app.pdfIn PDF document text
    • http://usacarins.com/velenakeko3egcp.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368763/normal_5fd2421fc1768.pdfIn PDF document text
    • https://cdn.sqhk.co/zizenozi/jip4ggk/cuba_travel_restrictions.pdfIn PDF document text
    • https://nubajegi.weebly.com/uploads/1/3/0/8/130814178/b8d5b4c40ce8.pdfIn PDF document text
    • http://blankid.ru/what_is_the_average_per_capita_income_in_argentinamxnow.pdfIn PDF document text
    • https://cdn.sqhk.co/letareximo/7hejc0K/arrow_gold_gps_price.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475866/normal_5fe3934d545e7.pdfIn PDF document text
    • https://merugerizun.weebly.com/uploads/1/3/4/3/134337850/8953896.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448549/normal_6056ed4bc9833.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387060/normal_5fe7d585813cc.pdfIn PDF document text
    • https://womovenurobo.weebly.com/uploads/1/3/1/8/131872055/236054.pdfIn PDF document text
    • https://fopezifu.weebly.com/uploads/1/3/4/7/134717551/8857582.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367303/normal_601726dd5b99f.pdfIn PDF document text
    • https://cdn.sqhk.co/lituxopevuk/hbicOgg/s4_live_wallpaper_apk_mirror.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/aefe6fe9-0a02-4a36-837d-2355e99457d8/94625709119.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eb58e5cb-3509-4371-b6e7-f1ee5b265fec/3552825776.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8d724339-1d0b-4a6f-ae80-f746ca40ffdd/the_silence_of_the_lambs_netflix_india.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/12d350a9-156b-4687-baff-6c4642656842/curso_tecnico__ensino_superior.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_off0000fd1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD1C 5644 bytes
SHA-256: 9157fd633ac1a6aa52c8d87eb4867dbd6c68ff77d68959d2aebe4ca29066255e
font_01_sfnt_off00010ffa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FFA 11340 bytes
SHA-256: 50259f097bbe2d7b75e4dbc04c9511a5fbc95c15aa90c7d35ce11285845c4d0b

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