Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc7e49335a9a09d7…

MALICIOUS

PDF

198.5 KB Created: 2021-07-25 10:08:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: a5f071fb6b77a3c8ad44ba358cc898e3 SHA-1: 46758a9786e7809687258399778a61897d196b64 SHA-256: dc7e49335a9a09d73ddea4b0cdbe2ea5069a8e0d7993a274b6b0ea1f21cd5aba
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, with several pointing to compromised WordPress upload directories, indicating a likely attempt to host malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links are consistent with phishing or malware distribution lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7518

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://htapigroup3.com/contents//files/koduve.pdf In PDF document text
    • http://www.pilonidalsinus.gen.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1607369a1b5303---87284449943.pdfIn PDF document text
    • http://principessavencanice.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070b0b35084f---51611367979.pdfIn PDF document text
    • https://wodgluch-projekt.pl/userfiles/wabikosonavoxuvujolosuwup.pdfIn PDF document text
    • http://holzweiss.at/10702879919.pdfIn PDF document text
    • https://www.hadlowsecurityshutters.com/wp-content/plugins/super-forms/uploads/php/files/01f3c3edd2aa9c89cfc3b594fa2705c6/41687041802.pdfIn PDF document text
    • http://autosoftware.company/autoresponders_images/files/mukajijiduwazoko.pdfIn PDF document text
    • https://www.chauffeur-prive-nice.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160b951f8071f6---97487988777.pdfIn PDF document text
    • https://www.inter-tube.co.uk/wp-content/plugins/super-forms/uploads/php/files/6528fc82099d0110b49f22197daf0ccb/93737129993.pdfIn PDF document text
    • https://www.lipfish.no/wp-content/plugins/formcraft/file-upload/server/content/files/160b4fa1c50f3e---wimurofoxetagizak.pdfIn PDF document text
    • http://itnetworkconsultingsf.com/helpdesk/app/webroot/img/userfiles/files/53402056225.pdfIn PDF document text
    • https://canadiancontractorservices.com/wp-content/plugins/super-forms/uploads/php/files/jdk91dk5fj8g6r6shhca6kia22/53478960131.pdfIn PDF document text
    • http://www.leesii.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085dc50be810---11628865724.pdfIn PDF document text
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/b20acc4a2c87da5ff8620b5556c794b9/mizimawakanobakekematatov.pdfIn PDF document text
    • http://wmehoa.org/clients/d/df/dff1b85474dadb967ea0c40f6d5e37f8/File/zofos.pdfIn PDF document text
    • https://www.certificagreen.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607340a190cff---megupugogavejirul.pdfIn PDF document text
    • http://spielundlicht.de/content_provider/documents/files/mojitemejodo.pdfIn PDF document text
    • https://rdw-wolf.de/backend/ckfinder/userfiles/files/kovesosuxugufidixexebego.pdfIn PDF document text
    • https://art4you.sk/editor_uploads/system/files/73121413180.pdfIn PDF document text
    • https://eberli-medical-supply.ch/upload/file/37643817705.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a92dec429d8---lomutax.pdfIn PDF document text
    • https://mobistore.co.nz/wp-content/plugins/super-forms/uploads/php/files/f11118b2c5f57b826b6ecac2fbf09de3/31338686772.pdfIn PDF document text
    • http://lotusromeo.fr/app/webroot/files/userfiles/files/59556393296.pdfIn PDF document text
    • http://stjconsulting.it/userfiles/files/kimomakuvi.pdfIn PDF document text
    • http://yuseigachi.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608e9ed1e7601---68604999198.pdfIn PDF document text
    • https://brs.jo/userfiles/files/54296959395.pdfIn PDF document text
    • http://greenbrier101.com/userimages/62180771689.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=literatura+universal+1+bachillerato+apuntesPDF 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_off0002a48c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2A48C 20300 bytes
SHA-256: 4f218878233f92f5a0b4eb955dafcf4d9eea5bd075947044d634eb6986c47de9
font_01_sfnt_off0002d777.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2D777 10784 bytes
SHA-256: 69906ef25d0572e7ab5c11c69507549e4903fb76ba945a274529d069a535d993
font_02_sfnt_off0002f01e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F01E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1