Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe64b634fdd6f96f…

MALICIOUS

PDF

90.7 KB Created: 2021-06-30 21:48:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 3f2cbbad50ef576159f7e460d4bf49dd SHA-1: 76bee940a440948f44d412312b84b72ef2ba3f3d SHA-256: fe64b634fdd6f96fcfc352207a909767928868eb1b77ab08f13b2cc4bb24cd8d
164 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links to compromised WordPress sites and a visual download button, suggesting a phishing or malware distribution lure. The presence of multiple links to compromised CMS upload directories points towards an attempt to host or distribute malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://www.drserapkagan.com/wp-content/plugins/super-forms/uploads/php/files/gdjt8eas6803t4kvipv7lis20i/zezugutom.pdf In PDF document text
    • http://israel-aliya.com/wp-content/plugins/super-forms/uploads/php/files/b5142363c1e87a314b87338a3c8e9ede/25174083463.pdfIn PDF document text
    • http://creatinglifeoptions.com/userfiles/files/vuvotegizo.pdfIn PDF document text
    • https://www.aserspa.net/wp-content/plugins/super-forms/uploads/php/files/elogh4o28j9sp9bjvvo477i3r5/dipovozibesupibenugeripim.pdfIn PDF document text
    • http://www.apsetedavisi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c878dede69---33587763212.pdfIn PDF document text
    • https://pyhm.ca/wp-content/plugins/super-forms/uploads/php/files/b66a35ih18jnb409ejkmglo38f/43001843532.pdfIn PDF document text
    • https://mamproducciones.es/wp-content/plugins/formcraft/file-upload/server/content/files/160964548a3293---66804321961.pdfIn PDF document text
    • http://triumphtoday.org/wp-content/plugins/formcraft/file-upload/server/content/files/160ac01975149e---96328648682.pdfIn PDF document text
    • http://drvision.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607f18f2d4bd3---95523333166.pdfIn PDF document text
    • http://iideree.org/wp-content/plugins/formcraft/file-upload/server/content/files/16082adacc0ff9---suxokigenagosodu.pdfIn PDF document text
    • https://www.growxponential.com/wp-content/plugins/super-forms/uploads/php/files/17sdcvrmf3juj8vukklam0ggdi/pigewopulakanesuvegipa.pdfIn PDF document text
    • http://delannahotel.com/user_img/file/59630954986.pdfIn PDF document text
    • http://meble-tk.pl/userfiles/file/wawefimoxigegusus.pdfIn PDF document text
    • http://clear-es.net/yamituki-n/uploads/files/buwarawid.pdfIn PDF document text
    • https://nam.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607a8adbe542f---66737601869.pdfIn PDF document text
    • http://springswellness.net/wp-content/plugins/formcraft/file-upload/server/content/files/160abb5580af7b---zofitarixujasadem.pdfIn PDF document text
    • http://thehigh86.com/clients/13680/File/gaduronegoxibubibu.pdfIn PDF document text
    • https://sportli.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/16078920b01db3---mamowovelopep.pdfIn PDF document text
    • http://www.asejnrtigers.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160be4f3a00976---bilonajaxosijepedapir.pdfIn PDF document text
    • https://bluebeakbranding.com/wp-content/plugins/super-forms/uploads/php/files/5914ead7739a9dea23965254153783e1/tediwafigubovovabesaf.pdfIn PDF document text
    • http://aranykoronakft.hu/userfiles/file/mulojufiwodufafa.pdfIn PDF document text
    • https://briljant-maleri.se/UserFiles/files/guxotorojilulajubif.pdfIn PDF document text
    • http://macautemple.com/userfiles/file/8125005514.pdfIn PDF document text
    • https://adiwirawanbali.com/wp-content/plugins/super-forms/uploads/php/files/90e667be5f8bb64971aac7aadd9dd162/giliku.pdfIn PDF document text
    • https://kalatranslation.co.uk/wp-content/plugins/super-forms/uploads/php/files/1f7a48a4ogth53h8j75a22ss4t/4876010325.pdfIn PDF document text
    • http://westboroughhigh76.com/clients/b/bc/bc4984db1d461a603911d7e4814e3e59/File/nuvopasoditefolewexaf.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=stem+dicot+and+monocotPDF 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_off0000fe11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE11 10292 bytes
SHA-256: 0fc2795f03c7f8533d596adf7c0d59d0ff38c495cd4d93907157f12bb971e802
font_01_sfnt_off0001153d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1153D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012d4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D4F 18416 bytes
SHA-256: 187b2f366837e944c70e2c6187ba917568858f7fce2fb3ebe16c6d1951d2d80b

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