Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6e5720a3cf155a2…

MALICIOUS

PDF

85.5 KB Created: 2021-08-09 17:54:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: ffd42153f78fc93ea37765262fba5135 SHA-1: 93e15bcb1bc965ededd922a11f4f5be23c3df363 SHA-256: e6e5720a3cf155a2173f7b70561b51642469d856857db47c0e3dd999c8038964
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous links to external websites, many of which are hosted on compromised or disposable domains, indicating a link farm designed to distribute malicious content or phish users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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 http://studiotecnicoarduini.eu/userfiles/files/nitunaga.pdf In PDF document text
    • https://coimbatorepressclub.com/FCKeditor/userfiles/file/rubiludupotitufagada.pdfIn PDF document text
    • http://misterholidaysanprisco.it/userfiles/files/rirunozoza.pdfIn PDF document text
    • http://www.radioemka.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e54fef703af---xezamegezedi.pdfIn PDF document text
    • https://alignerco.com/wp-content/plugins/super-forms/uploads/php/files/94bc7fdbd5dfe6622454e7e154aa11b5/56358577472.pdfIn PDF document text
    • https://universal4shipping.net/userfiles/file/pawivuzukitavabixusoseka.pdfIn PDF document text
    • http://www.radiopopiatej.com/wp-content/plugins/formcraft/file-upload/server/content/files/160731dc291bfa---xabizonudepamagem.pdfIn PDF document text
    • http://sictombbi.fr/ckfinder/userfiles/files/katamofafebijili.pdfIn PDF document text
    • http://www.festivalmarrakech.info/wp-content/plugins/formcraft/file-upload/server/content/files/160db2780b0683---datagosofidat.pdfIn PDF document text
    • https://mayxaydungthienlong.com/uploads/files/files/volobajifoxopolajefojefe.pdfIn PDF document text
    • http://thm-holding.ru/wp-content/plugins/super-forms/uploads/php/files/afaccef5c795882d76fdb3a6a75ab012/rasufazamelodutuvifonez.pdfIn PDF document text
    • http://kpdb.org/userfiles/files/vumirowu.pdfIn PDF document text
    • https://suadienlanhhanoi.net/upload/files/dexakiredaki.pdfIn PDF document text
    • http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/kcfg1i35ocjj7f73nqerab4nl2/rivugopalibugidawulo.pdfIn PDF document text
    • https://www.napariverinn.com/wp-content/plugins/super-forms/uploads/php/files/72dc52fd429726a0c9b3488c04172e61/60798787686.pdfIn PDF document text
    • https://fundacionamigosdelmarcaribe.ong/ckfinder/userfiles/files/35041166978.pdfIn PDF document text
    • http://limpiasol.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e29111d69d7---64306810189.pdfIn PDF document text
    • https://toolsatool.com/userfiles/files/guzafudejilufuzo.pdfIn PDF document text
    • http://dwornawodzie.pl/userfiles/file/46489778716.pdfIn PDF document text
    • https://allcreaturesinc.com/files/files/92282260173.pdfIn PDF document text
    • http://yaqeen-eg.com/userfiles/file/waragakagevirare.pdfIn PDF document text
    • https://pui-vital.ro/msg_media/file/livuful.pdfIn PDF document text
    • https://chefinhogourmet.com/wp-content/plugins/super-forms/uploads/php/files/11d18967e69a97458ca9ee86255d8e2a/duvelatukobukelej.pdfIn PDF document text
    • http://studioarchperissinotto.eu/userfiles/files/sedetiwunebipetu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=how+to+do+ledger+reconciliationPDF 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_off0000ed54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED54 16728 bytes
SHA-256: ee354bb7eb5e6eb0362512e3afbd0947e5a1f3c534900feb650a9b958e41f720
font_01_sfnt_off00011896.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11896 10452 bytes
SHA-256: 08acf2d4a973961dd4b24b9c72827570c57d6239fe34732de352226d7147db50
font_02_sfnt_off00013035.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13035 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1