Malicious PDF — malware analysis report

Static analysis result for SHA-256 d68c4422ca789aef…

MALICIOUS

PDF

79.9 KB Created: 2021-07-17 02:11:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 3fc9ce26666cf8b83d4d6dc2b40b696c SHA-1: 200a082d16d301ef223bf475972a5a51fede7c9d SHA-256: d68c4422ca789aef5b0dc12c34603ce9da95f16cf16f540e342d8b9e968924fc
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file is identified as malicious by ClamAV and exhibits characteristics of a link farm, with numerous URLs pointing to potentially compromised websites. The PDF document body is heavily obfuscated, but the presence of embedded URLs and the heuristic findings suggest an attempt to redirect users to malicious content, likely for phishing or malware delivery. No scripts were extracted, but the PDF structure itself is leveraged to host these links.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4818

Heuristics 5

  • 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
  • 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://alteanetworks.fr/img/file/bazawaxipusanotusaniveto.pdf In PDF document text
    • https://cavalier-hundezucht.ch/userfiles/file/24013177076.pdfIn PDF document text
    • https://alcoquimicos.com/ckfinder/userfiles/files/92239624176.pdfIn PDF document text
    • https://senzedigicraft.com/wp-content/plugins/super-forms/uploads/php/files/954da3b6aaaf9ce9256b36ee949c49e4/25744259343.pdfIn PDF document text
    • http://tortsurprise.ru/upload/redactor/files/15226425569.pdfIn PDF document text
    • http://files.ibiza-ferien.de/file/12977947685.pdfIn PDF document text
    • https://www.areatransfers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e698880dd53---9161545686.pdfIn PDF document text
    • http://www.doctor-carpet.com/wp-content/plugins/super-forms/uploads/php/files/hrf5fj595rlb4ma0ln5jg31fe5/bezebebupabarajo.pdfIn PDF document text
    • https://lsp.od.ua/wp-content/plugins/super-forms/uploads/php/files/fmm19du5jmfqgk8b5pa5ud5a90/58250619924.pdfIn PDF document text
    • http://viral-list-machine.com/ckfinder/userfiles/publics/files/nitajixuwafugufijabevimur.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b7550596f8e---23632205467.pdfIn PDF document text
    • http://enjoy.sk/editor_uploads/system/files/zazefu.pdfIn PDF document text
    • http://thomas-reunion.com/clients/8/86/86f5f051d314e00f57792b8428d7085d/File/wamunepamigi.pdfIn PDF document text
    • http://fkhd.cz/data/img/xesaviwoma.pdfIn PDF document text
    • https://3dreamvr.com/wp-content/plugins/super-forms/uploads/php/files/61f80530e23cf6ce50b48bd8606aa012/lugeronogisadajifi.pdfIn PDF document text
    • http://furkansigorta.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1607e33351fe0f---44963553284.pdfIn PDF document text
    • https://alphaveneers.co.uk/wp-content/plugins/super-forms/uploads/php/files/17d9ee7a195ab08ec105e47c02a27ca0/xusasa.pdfIn PDF document text
    • https://creationstationdance.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070358c85798---xevodurupevowoxoxajufikez.pdfIn PDF document text
    • http://www.christinemartin.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607fbc1a080d7---69873914999.pdfIn PDF document text
    • https://betonwerkendejonge.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b70d84c2277---wedanezofosasanukisi.pdfIn PDF document text
    • http://rudolphalexander.com/uploads/files/dosaz.pdfIn PDF document text
    • http://www.sempresaude.net/wp-content/plugins/formcraft/file-upload/server/content/files/160ae28a64df74---jiwejokur.pdfIn PDF document text
    • http://pmdrecycling.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aaaff29125b---91296246019.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=open+pdf+file+in+html+pagePDF link annotation
    • 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_off0000e85e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE85E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010075.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10075 10580 bytes
SHA-256: 07aa620fa8124645742d2bac1557f44d196aa4bb3c98af62afc7e3c2958e9acc
font_02_sfnt_off0001182c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1182C 18156 bytes
SHA-256: 97dcad83e0a10542c7058677e07844af74ecacd0c2364f95b41e7b0ddf654162