Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e33bd5ce48dd002…

MALICIOUS

PDF

82.1 KB Created: 2021-08-25 02:21:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: c52d7748e954da1c30d293e0d8861b32 SHA-1: ad1565af9823d661064b2dc6a3297f3ec82cc52d SHA-256: 7e33bd5ce48dd0025b971827f97e457603a68d2b9f8bdcf40b561b6bae3368fb
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged as malicious by ML classifiers and ClamAV. It contains numerous links pointing to compromised websites, including WordPress upload directories, suggesting a phishing or malware distribution campaign. The presence of multiple external URIs and link farms indicates an attempt to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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 https://garglob.ru/uplcv?utm_term=how+to+change+your+ingame+fortnite+name PDF link annotation
    • https://www.nestroots.com/wp-content/plugins/super-forms/uploads/php/files/v107o180cfhho2idab6ddaa115/xepodilimozegera.pdfIn PDF document text
    • https://digireg.es/upload/10192750892.pdfIn PDF document text
    • http://www.next-conseil.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160ac0e410627b---63180633806.pdfIn PDF document text
    • http://xn--80aafkqcanfpgnhbng3b5i9a.xn--p1ai/pict/file/bojenazuvorevasegokew.pdfIn PDF document text
    • https://amesmedicalservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160adaf17dc3a1---62598640662.pdfIn PDF document text
    • https://djennebeads.com/nbloom/fckuploads/file/pupizuduw.pdfIn PDF document text
    • http://bjjiffy.com/upload/53450624605.pdfIn PDF document text
    • http://sanmorales.es/userfiles/files/59188495780.pdfIn PDF document text
    • http://evola.it/userfiles/files/tinexeren.pdfIn PDF document text
    • https://fzclicks.com/demo/files/editor/file/rixifobexovujesuvononak.pdfIn PDF document text
    • https://goactive.hu/wp-content/plugins/super-forms/uploads/php/files/48d27547fb2a39327c89cebf5e5e23a6/dagiroxejagetu.pdfIn PDF document text
    • http://dooroc.com/tk/upload/file/80780721828.pdfIn PDF document text
    • http://discoveryenglish.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b19258e89dd---dodus.pdfIn PDF document text
    • https://web-sila.ru/wp-content/plugins/super-forms/uploads/php/files/07a10cc784b211e71bba571425100f47/24174153362.pdfIn PDF document text
    • https://thesmithgrouphouston.com/wp-content/plugins/super-forms/uploads/php/files/11a233f807776bfcdcb9c58ab76d0a43/pazilifixepofimejawuwiloz.pdfIn PDF document text
    • https://www.picmephotoboothhire.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16099531b739b8---bujezaxe.pdfIn PDF document text
    • https://giolog.biz/images/bulk_images/files/6639275657.pdfIn PDF document text
    • https://www.casestilistas.es/ckfinder/userfiles/files/88895092136.pdfIn PDF document text
    • https://navoloki.mebel18.com/uploads/files/fetiferu.pdfIn PDF document text
    • http://ersatzmonitor.de/userfiles/file/fujetivosuxu.pdfIn PDF document text
    • https://deewo.de/wp-content/plugins/formcraft/file-upload/server/content/files/160d1f50d7a7a3---rezexaloterijo.pdfIn PDF document text
    • http://cyuanmei.com/userfiles/file/60673038884.pdfIn PDF document text
    • https://uzunlarpeynir.com/dursun/upload/files/12887699856.pdfIn PDF document text
    • http://zl369.net/userfiles/file/78762744218.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_off0000db09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB09 10860 bytes
SHA-256: a552e0d85288d78b6958e6af29b3479e3e853d450c473f81a2394e151f2c2c3a
font_01_sfnt_off0000f3f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3F9 16968 bytes
SHA-256: aede2680e94e88d3b500133c6d827d0f72adf92b7983cd2e2cbdc9288eb2bb32
font_02_sfnt_off00012032.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12032 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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