Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c0a2b0dcbc5db02…

MALICIOUS

PDF

96.0 KB Created: 2021-08-08 19:52:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 47ce2b91d87a73f40666a3c050a40eb5 SHA-1: 52535ae5940ae19a74d95dc02a700cac3042a31f SHA-256: 6c0a2b0dcbc5db024380ad3effe9dbdf95a103c3877fa025a938478f82d0aac2
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm with numerous URLs, many hosted on compromised CMS platforms, suggesting an attempt to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were directly extracted, the structure and URL findings point towards a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://angkagenap.com/contents//files/74356150979.pdf In PDF document text
    • http://itssilvertime.com/clients/2/24/24efe347a73a8ce028152bf895bc11a7/File/22138808529.pdfIn PDF document text
    • http://mmdplus.com/userfiles/files/20210604_111636.pdfIn PDF document text
    • http://webelievedin1984.com/clients/6/67/676624d6593aa512bfa6e10e765af00e/File/takasanosivalomozop.pdfIn PDF document text
    • https://ochronaskory.pl/pliki_user/File/51771410570.pdfIn PDF document text
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/spq24jqvmgde58kplo85qqbt01/sixubasewiridikutomububex.pdfIn PDF document text
    • https://aashianarealty.com/file/33913010838.pdfIn PDF document text
    • https://m-co.de/wp-content/plugins/super-forms/uploads/php/files/49t73rkta2kf2jeba6sdr31u45/gaforisi.pdfIn PDF document text
    • https://tenfci.org/userfiles/file/kuxuzonojoser.pdfIn PDF document text
    • http://www.rebranded.tv/wp-content/plugins/formcraft/file-upload/server/content/files/160afbdf8e5c38---91550476886.pdfIn PDF document text
    • https://avantkart.com/wp-content/plugins/super-forms/uploads/php/files/0obkfn9ljslg21kk1rg8apejke/26461737378.pdfIn PDF document text
    • https://www.yoursurveysurveyors.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a1bee92f3d9---katamidozanizadap.pdfIn PDF document text
    • https://regalcabs.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607148f0ef920---1909942216.pdfIn PDF document text
    • https://nuevocoach.co.uk/wp-content/plugins/super-forms/uploads/php/files/03edc436bd8c6aa87b6079623fcbbacf/31385196955.pdfIn PDF document text
    • https://nuevocoach.co.uk/wp-content/plugins/super-forms/uploads/php/files/7efba47f9ee7eb7a5d335b2197ec3991/rawevawixexamajeti.pdfIn PDF document text
    • http://omniatel.it/wp-content/plugins/formcraft/file-upload/server/content/files/160c93ca81a054---jenujidomubadozifogabu.pdfIn PDF document text
    • http://travelport.pl/userfiles//file/dibirepogumef.pdfIn PDF document text
    • http://duetsepolno.pl/userfiles/file/rixawemapapesugiv.pdfIn PDF document text
    • http://bagumul.com/file_upload/spaw_upload/file/20210505040429.pdfIn PDF document text
    • https://www.infrascale.com/wp-content/plugins/super-forms/uploads/php/files/e587edd2026e1eb530d2c1d9da0b10a0/widuk.pdfIn PDF document text
    • http://aostavet.it/userfiles/files/vegotelokutuze.pdfIn PDF document text
    • https://www.zulilighting.com/wp-content/plugins/super-forms/uploads/php/files/0e39f0c5b1b896a410da6be21c15a1fb/tesikulibafele.pdfIn PDF document text
    • http://coeb.eu/userfiles/files/23589631271.pdfIn PDF document text
    • https://die-elke.de/cms/elke_page_files/file/69467004.pdfIn PDF document text
    • http://makaifruits.com/wp-content/plugins/formcraft/file-upload/server/content/files/160857b823dd62---pefatata.pdfIn PDF document text
    • https://bf-pomosch.ru/wp-content/plugins/super-forms/uploads/php/files/fo0u3url1uv80q3tjgpsqmub21/10113124542.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=can+you+cheat+in+golf+clashPDF 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_off00011350.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11350 17508 bytes
SHA-256: ad8aeb5f44c1fcdf44406d02e71e711572ac73c5d3af3f4d0a55a4c3f0f24b16
font_01_sfnt_off00014117.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14117 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001592e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1592E 10760 bytes
SHA-256: 8ce5c6f5f73035fcaf592596f6a59a653ba7c0946f0151ddd2159500d9ae6de6