Malicious PDF — malware analysis report

Static analysis result for SHA-256 fdba1cd2190157cb…

MALICIOUS

PDF

82.0 KB Created: 2021-04-19 12:53:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 0a2202fc87028028309172f98bae3324 SHA-1: ebb14564866f2f4587c95b4a37cd1753bb4a658e SHA-256: fdba1cd2190157cba2905f0c1dbf035140d64c1321df1ec5e06a08221c083abf
126 Risk Score

Malware Insights

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

This PDF was flagged by multiple heuristics, including a high-confidence ML classifier and ClamAV detection, indicating malicious intent. It contains numerous embedded URLs, many pointing to disposable domains, suggesting a link farm or redirection mechanism. The presence of external URIs and the overall detection as a phishing trojan strongly suggest it is used as a lure to redirect users to malicious sites.

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://jacksth.ru/strik?utm_term=nutrition+bojangles+sausage+biscuit PDF link annotation
    • http://jazizuzosa.iblogger.org/zenaxoluje.pdfIn PDF document text
    • http://waxopuvuru.22web.org/my_immortal_evanescence_piano_sheet_music_free.pdfIn PDF document text
    • http://wopazav.22web.org/16109165285.pdfIn PDF document text
    • http://covid-19online.site/12297928052lfdk0.pdfIn PDF document text
    • https://lolemifazez.weebly.com/uploads/1/3/1/8/131871650/tifumupelev-bamexozaga.pdfIn PDF document text
    • http://alkim.xyz/ccna_2_chapter_7_answers_20190c7pd.pdfIn PDF document text
    • https://fifikasato.weebly.com/uploads/1/3/1/4/131437502/3733021.pdfIn PDF document text
    • http://tekupugu.sportsontheweb.net/48124766614.pdfIn PDF document text
    • https://jedamebised.weebly.com/uploads/1/3/4/6/134651392/wixutuwowakuna_niroputijefoki.pdfIn PDF document text
    • https://nejajabowiwuxo.weebly.com/uploads/1/3/0/7/130775705/92b89da4fed.pdfIn PDF document text
    • https://rizofuruw.weebly.com/uploads/1/3/0/8/130873790/2579939.pdfIn PDF document text
    • http://dipugipedanam.sportsontheweb.net/boss_gt_100_manual_portugues.pdfIn PDF document text
    • http://tudejeseruleku.iblogger.org/39839200375.pdfIn PDF document text
    • https://zajewovebuvi.weebly.com/uploads/1/3/0/7/130739158/fewanip.pdfIn PDF document text
    • https://tasikedojawepu.weebly.com/uploads/1/3/4/4/134473564/eabdced5197ff21.pdfIn PDF document text
    • http://wosozage.mypressonline.com/mamelizimovowipixojijit.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • http://bujavajivedejin.rf.gd/honeywell_8000_install_instructions.pdfIn PDF document text
    • http://lofunadex.myartsonline.com/adjective_order.pdfIn PDF document text
    • http://satidowiruv.rf.gd/lurosudazotuzipanefegebi.pdfIn PDF document text
    • http://mowesedapi.epizy.com/renuncia_benedicto_xvi.pdfIn PDF document text
    • http://gupezifiromok.epizy.com/assassins_creed_brotherhood_book_review.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
    • http://www.gnu.org/licenses/gpl.htmlIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000edce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDCE 5152 bytes
SHA-256: d5108c7f453de0cef03d422687688abd8f77f4f2bff5f7276e297ebeb330f5ec
font_01_sfnt_off0000ff64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF64 8412 bytes
SHA-256: cf63bc64973aae88497c70731521345dbf9ccc9ce179bff9af50d934388541af
font_02_sfnt_off0001169c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1169C 10472 bytes
SHA-256: 043e288e253859a8d8364d976836ad63d3f44a64d644c122c7416c0fe4d61e4a

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