Malicious PDF — malware analysis report

Static analysis result for SHA-256 0dd8fe6b63d6eca2…

MALICIOUS

PDF

109.1 KB Created: 2021-07-01 11:25:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: f2d10f95c2c1f9d089debc389b106667 SHA-1: 3876486afdc06efb0f1f155303936b1359e5fd9a SHA-256: 0dd8fe6b63d6eca293eb7b59ebe535cdd3c07fb1aaff5defee7c0b7f70e00700
156 Risk Score

Malware Insights

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

The sample was identified as malicious by ClamAV and an ML classifier, with heuristics indicating it functions as a link farm. Multiple URLs point to compromised CMS upload directories or disposable hosting, suggesting an attempt to lure users to malicious sites. The PDF's structure and numerous links are consistent with phishing or malware distribution tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9868

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://apartmaji-zunicmile.com/uporabnik/file/zumabugezupimat.pdf In PDF document text
    • http://webscape.co.bw/wp-content/plugins/formcraft/file-upload/server/content/files/160aefe63747bd---xinonofafajilekorekajufer.pdfIn PDF document text
    • http://bensonlandscape.com/editorData/file/xodivurubuxurovas.pdfIn PDF document text
    • http://luckyassessoria.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160aaa438ab328---wufidofilakuvirot.pdfIn PDF document text
    • https://cowichanmusicfestival.com/userfiles/file/45982304174.pdfIn PDF document text
    • http://a-swiss.com/upload/userfiles/file/famuloxogu.pdfIn PDF document text
    • http://xn--or3bi2da319p.com/upload/fckeditor/file/mujaxozuwowiz.pdfIn PDF document text
    • https://www.ogblfrontaliers.fr/wp-content/plugins/super-forms/uploads/php/files/tsglkbapi1ucqjot30trt4l8n9/94582658265.pdfIn PDF document text
    • http://macautemple.com/userfiles/file/zagutisevuvimikulo.pdfIn PDF document text
    • http://sofia-es.tokyo/yamituki-n/uploads/files/59734617940.pdfIn PDF document text
    • http://ahxxzx.com/userfiles/202106/file/3575619169.pdfIn PDF document text
    • http://erulingua.hu/uploads/content_files/files/23979999229.pdfIn PDF document text
    • https://greyquotient.com/wp-content/plugins/super-forms/uploads/php/files/2c746114837e1b98492b21f0c3830b62/41896852533.pdfIn PDF document text
    • https://refour.dk/wp-content/plugins/super-forms/uploads/php/files/9e3ef5d36e517d01c6b3a5acb8cae5a8/97105554388.pdfIn PDF document text
    • https://shiphangnhanh.net/uploads/image/files/63029468958.pdfIn PDF document text
    • http://usagimatur.com/files/others/genilopumisifibiti.pdfIn PDF document text
    • https://meesens.be/KrMee/Tekstverwerker/runigobojifimozukar.pdfIn PDF document text
    • https://web-sila.ru/wp-content/plugins/super-forms/uploads/php/files/a121a1327106e263e19e6968db8f352b/zuwudetarixugajotinisa.pdfIn PDF document text
    • https://stakeoutllc.com/wp-content/plugins/super-forms/uploads/php/files/6b9384519af2644cfb0a7c00a223a1b6/8722204464.pdfIn PDF document text
    • https://astek-telem.fr/userfiles/file/7894524428.pdfIn PDF document text
    • https://coachtourbusrental.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a5d17769ad---78801534151.pdfIn PDF document text
    • https://www.physioaktivkramer.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a2efdee2db8---64225819082.pdfIn PDF document text
    • http://learningkey.org/userfiles/12372076726.pdfIn PDF document text
    • https://www.accidentinjuryalbuquerque.com/wp-content/plugins/super-forms/uploads/php/files/losmnu2emo2fonnlisu9idkfc5/xetidugitexezime.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=what+does+a+simmer+meanPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00013257.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13257 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00014a6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14A6E 10460 bytes
SHA-256: eb831cc83f7d26f54d3c7eb06f0e43c8440371595cf34d7370d9527aa6561c50
font_02_sfnt_off000161fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x161FC 16060 bytes
SHA-256: 8bfc5e2f6383778b4716e60c732a7e5228106b692ca52c1f6b3c0b2892049825
font_03_sfnt_off0001770b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1770B 18044 bytes
SHA-256: 126021327c361ac903dd80202bc2fedf2bd9acd3fe8e00a92398e3de92edc9c0