Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ce3f96dc76a180d…

MALICIOUS

PDF

85.5 KB Created: 2021-09-02 04:55:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 9b707500de781c08f3b1a195ad7abae2 SHA-1: 4194b473f8caa9a1c1a17f3bef3fcec03d7a57ff SHA-256: 2ce3f96dc76a180db93c4c62dc9c99facea98fd6e3707dadb3eb38664f7f5911
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to compromised WordPress sites, indicating a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and URL patterns are indicative of a malicious document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://pensiuneavlasin.ro/wp-content/plugins/super-forms/uploads/php/files/g74de5ts0q9tq4amt7g5j4flda/59397073439.pdf In PDF document text
    • https://dtcprojects.com.au/wp-content/plugins/super-forms/uploads/php/files/hs2mr87dquscb2bamp5kgkm0n1/xivitijoj.pdfIn PDF document text
    • http://aire-limpio.com/img/editor/file/saderojufugidad.pdfIn PDF document text
    • https://www.deuba.info/wp-content/plugins/super-forms/uploads/php/files/vjdcsk031spu48d4id5fnru4m3/lijoginobovajafupox.pdfIn PDF document text
    • http://zrdb-drogbud.pl/Upload/file/tazeditakozovep.pdfIn PDF document text
    • http://asirakademi.com/resimler/files/73014150501.pdfIn PDF document text
    • https://atlastoursntravels.com/userfiles/file/faponu.pdfIn PDF document text
    • https://mariellatriolo.it/public/file/duzelenedafuregojeta.pdfIn PDF document text
    • https://www.energetisch-therapeut-estie.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160788a997ae7d---nenanavufoxibirevafi.pdfIn PDF document text
    • http://saveursetsavoirs.fr/image/file/kovamijibewevaji.pdfIn PDF document text
    • http://fairway.cc/images/blog//file/nafaduger.pdfIn PDF document text
    • https://taipeitccia.org/CKEdit/upload/files/43669836873.pdfIn PDF document text
    • http://brcassociati.com/userfiles/files/powufodewifogawed.pdfIn PDF document text
    • http://copy2d.com/ftp/image/file/pumaju.pdfIn PDF document text
    • http://www.onekaddy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b8767f04d5c---pasonigebelurutivof.pdfIn PDF document text
    • https://auditorescr.com/ckfinder/userfiles/files/puravokuzeguzefufakugu.pdfIn PDF document text
    • https://stakeoutllc.com/wp-content/plugins/super-forms/uploads/php/files/17fd479cc56c450ae7fc383573960824/9953553982.pdfIn PDF document text
    • https://lentes123.com/aym_image/files/suwuzuxurabapavub.pdfIn PDF document text
    • http://acetuitioncentre.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a153836614a---64074387113.pdfIn PDF document text
    • http://thermcom.cz/userfiles/file/titudibosuxi.pdfIn PDF document text
    • https://islandsvefir.is/wp-content/plugins/super-forms/uploads/php/files/p31p8onoepo0euua6al5ihjmj9/joferimu.pdfIn PDF document text
    • https://proff-doors.ru/wp-content/plugins/super-forms/uploads/php/files/3d678d1055b03713069b678302a64ace/42514202907.pdfIn PDF document text
    • http://drivescuolaguida.it/userfiles/files/gotarobijodejugugudikeniz.pdfIn PDF document text
    • http://telek-trans.hu/editor_up/riroxub.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=free+gems+clash+royale+no+downloadPDF 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_off0000e5e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5E9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fe00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE00 10804 bytes
SHA-256: 21cfde622597f36c1fca05bb83dd69b32eb41fdc641cee2293a9f1d6e217e0d8
font_02_sfnt_off0001168c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1168C 18512 bytes
SHA-256: 9b6c3efd7d289b67108c6daa4eee81ab439eb55b350d9494dc28cc2ad14b98b1

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