Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ed14992984c60ea…

MALICIOUS

PDF

91.2 KB Created: 2021-09-16 01:31:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 9c2922dbbe4efbe19d9121f2ebbb4c72 SHA-1: 09c2a5d947c756c67f63e4b3366a6fcf304f2f2c SHA-256: 5ed14992984c60ead995ffdf105ccac1822f0451d23471e7ae13f73de946354f
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was flagged by ML classifiers and ClamAV as malicious, with heuristics indicating it functions as a link farm. Multiple embedded URLs point to disposable hosting, suggesting an attempt to obscure the final destination, likely a phishing or malware distribution site. The `PDF_SEO_DISPOSABLE_LINK_FARM` heuristic specifically highlights the use of numerous distinct hosts and UTM parameters, reinforcing the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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://xn--90aoja6ahg5ds.xn--p1ai/uploads/files/4340951085.pdf In PDF document text
    • http://coinproject.com/userfiles/image/file/zirazamuwudam.pdfIn PDF document text
    • http://gorod-r.com/userfiles/file/32725143649.pdfIn PDF document text
    • https://suma.ca/upload/editor/file/kibonubajakipetinulofa.pdfIn PDF document text
    • http://ufnk.fr/app/webroot/files/file/xidafupub.pdfIn PDF document text
    • http://bakoca.hu/files/file/50313014022.pdfIn PDF document text
    • http://volker-issmer.de/userfiles/file/77251449578.pdfIn PDF document text
    • https://learnrkbin.jugalbandiresearch.com/ckfinder/userfiles/files/86797682287.pdfIn PDF document text
    • http://ucinnovation.ru/admin/ckfinder/userfiles/files/18449933019.pdfIn PDF document text
    • http://niestachow.pl/data/aktualnosci_imgs/file/semunekatopesobewowobu.pdfIn PDF document text
    • https://xn--1--8kcai1ck2bs.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/c578ca32db7154f90a65c0b071948256/wojavaxupuzo.pdfIn PDF document text
    • https://hotelpancharatna.com/assets/userfiles/files/vozuzomasulisisejemawim.pdfIn PDF document text
    • http://atut-biuro.com/uploaded/file/jexebulogi.pdfIn PDF document text
    • http://travelport.pl/userfiles/file/pivalefamisipu.pdfIn PDF document text
    • https://alquimia.in/admin/fckeditor/editorfile/79298340194.pdfIn PDF document text
    • http://cegled.varosom.hu/userfiles/files/xaxijidugegojujemiguxi.pdfIn PDF document text
    • https://pisangmanis.com/contents/files/kabifagexujunubojero.pdfIn PDF document text
    • http://abpaluso.com/upload/file/3680810153.pdfIn PDF document text
    • http://conwaychristian.org/wp-content/plugins/formcraft/file-upload/server/content/files/1613da3dd421cd---86580607380.pdfIn PDF document text
    • https://dhesient.com/media/83077461413.pdfIn PDF document text
    • http://kalmi.ru/upfiles/files/sogevewipedo.pdfIn PDF document text
    • http://rigosarchitects.gr/userfiles/file/sexawudokelugotolilowu.pdfIn PDF document text
    • https://northwestconvention.cz/data/files/sopituxabogopelidet.pdfIn PDF document text
    • https://inprovitchile.com/ckfinder/userfiles/files/wozisim.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=how+to+check+real+samsung+phonePDF link annotation
    • 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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fe38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE38 10996 bytes
SHA-256: cea2121b9f3d817fad6f8537324a931641f3da9c7e847589226980d04255a43d
font_01_sfnt_off000117b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117B0 17960 bytes
SHA-256: d9e360f91e94f9a4633b483b9c83c1f139e84137d3d804e496cae01d5297e1c2
font_02_sfnt_off000146b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x146B3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1