Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9ccc8709f31083e…

MALICIOUS

PDF

69.9 KB Created: 2021-09-25 02:48:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 8289ebabd74586fe0e6a4d12c04675fc SHA-1: eb740a5df85ca58fd514e839381c6a0a26bff912 SHA-256: e9ccc8709f31083ebd1a89dc6c7c545bc1a21494cab8a208e3554006b63e8ffa
216 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs pointing to external resources, many of which are hosted on compromised CMS platforms or disposable hosting. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware delivery. While no scripts were explicitly extracted, the PDF structure and heuristic firings suggest it's designed to lure users to click on malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

Heuristics 8

  • 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 to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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 https://allytemp.ru/uplcv?utm_term=how+much+fish+do+otters+eat PDF link annotation
    • http://i-dron.cz/data/file/nixuwugevumidasatonu.pdfIn PDF document text
    • http://artstudiodesign.it/userfiles/files/58262122382.pdfIn PDF document text
    • https://www.rogierstoel.nl/wp-content/plugins/super-forms/uploads/php/files/id1kjr4ddu4bus496f2j8cdm7k/jobuje.pdfIn PDF document text
    • https://sapsda.org/SapmaUserfiles/file/rodijuwukefi.pdfIn PDF document text
    • https://epponline.com/mentorfinancial/page_images/file/87745872493.pdfIn PDF document text
    • http://giteduguedesboires.com/userfiles/file/39104523537.pdfIn PDF document text
    • http://solis.altrodesign.eu/ckfinder/userfiles/files/41994585306.pdfIn PDF document text
    • https://www.sgestrecho.es/wp-content/plugins/formcraft/file-upload/server/content/files/16131dda34a7c1---56835665190.pdfIn PDF document text
    • http://ambulatorioveterinarioilghirlandaio.it/userfiles/files/21469201370.pdfIn PDF document text
    • http://pusheng168.com/uploadfiles/20210915175746.pdfIn PDF document text
    • http://moneymaker-gold.de/files/livivegene.pdfIn PDF document text
    • http://185.33.116.145/~acus01/upload/files/wuzudi.pdfPDF link annotation
    • http://snookerfootball.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16136c7dd1a240---tipafotedajirodowomubat.pdfIn PDF document text
    • https://dodatnojamstvo.com/userfiles/file/sotodofabexoji.pdfIn PDF document text
    • https://satellietgroep.nl/userfiles/files/60053033401.pdfIn PDF document text
    • https://agrimal.pl/userfiles/file/89106865370.pdfIn PDF document text
    • http://seoulgreeter.com/userData/board/file/12748359377.pdfIn PDF document text
    • https://groupunsur3.com/contents/files/vafuvazodidinumom.pdfIn PDF document text
    • http://marcus-1.com/FileData/ckfinder/files/20210907_DAEA0AC6AC7192A5.pdfIn PDF document text
    • http://samurairamenbar.com/uploads/files/65510023750.pdfIn PDF document text
    • https://kicksomeglass.com/wp-content/plugins/super-forms/uploads/php/files/c64a1375a08d7de1589dfd8d93c489b3/xokedukunogebikamo.pdfIn PDF document text
    • http://psychanalyste-gard.fr/ckfinder/userfiles/files/vuruzarumiva.pdfIn PDF document text
    • https://franciscovalles.comtraining.cl/userfiles/files/62566926915.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://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_off0000b286.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB286 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ca9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA9D 10768 bytes
SHA-256: 69654d398f2968a394952e469004e4687dadd693959199d55eb09fc775ce2d17
font_02_sfnt_off0000e376.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE376 15188 bytes
SHA-256: 6a82a4056fdcfb3534fac261a9c87bbea4c9464a76c5faa857a8a203dfcfc9f8

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