Malicious PDF — malware analysis report

Static analysis result for SHA-256 d03d519c84563813…

MALICIOUS

PDF

121.1 KB Created: 2021-08-22 08:12:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: fce148f78ba525d9fa51e60ba1027e2c SHA-1: 0fec759e5d20a3fc58dae0757bbbefcdb583ad5e SHA-256: d03d519c84563813927e83332c02b7caf3b478714c0898b44e674d279da9084f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous links pointing to compromised WordPress sites, indicating a phishing or malicious redirection attempt. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution. Although no scripts were directly extracted, the structure and URL patterns are consistent with malicious PDF lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://neoville.ru/wp-content/plugins/super-forms/uploads/php/files/bd9dc8be72582af57b582bb9f2dbe2fb/2685749605.pdf In PDF document text
    • http://reklamavysocina.cz/UserFiles/File/25869624688.pdfIn PDF document text
    • https://takipcisec.com/calisma2/files/uploads/14446208313.pdfIn PDF document text
    • http://allmedicus.com/userfiles/file/wusugotawiwolo.pdfIn PDF document text
    • https://ambientltg.com/wp-content/plugins/super-forms/uploads/php/files/08712115e477a4bec2ca7e3f111896cd/70454377716.pdfIn PDF document text
    • http://ar-intl.net/wp-content/plugins/super-forms/uploads/php/files/hdf3gnr9um67j6j1fee1dm3h33/tarajisavo.pdfIn PDF document text
    • http://master-vin.ru/files/file/91141382042.pdfIn PDF document text
    • http://rkmaster.ru/uploads/files/jozelebisixakux.pdfIn PDF document text
    • https://bandotrading.com/uploads/file/xoneranilafibuwozokepo.pdfIn PDF document text
    • https://lotteppta.com/beta/assets/file/33234663291.pdfIn PDF document text
    • http://gshosnab.ru/userfiles/file/nudafifanodiraw.pdfIn PDF document text
    • http://ccswcd.com/userfiles/file/banodunidagusepu.pdfIn PDF document text
    • http://tele-video.ru/upload/files/gojutosi.pdfIn PDF document text
    • https://adikketiga.com/contents//files/84574033902.pdfIn PDF document text
    • https://www.citysecurity.org.uk/wp-content/plugins/super-forms/uploads/php/files/qsep5so8r9t2bvj0pboqp3u5cv/lemixuzizigivol.pdfIn PDF document text
    • https://conexus-study-abroad-travel.com/ckfinder/userfiles/file/nogebovatakus.pdfIn PDF document text
    • http://volkshilfe-vlbg.at/images/content/files/viwizapeforago.pdfIn PDF document text
    • https://ildiko-szepsegszalon.hu/userfiles/file/44720137194.pdfIn PDF document text
    • http://eia-edu.com/userfiles/file/xunotevobavabozirexusavi.pdfIn PDF document text
    • http://relocationservicesgroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607073be017f4---zafativexizovof.pdfIn PDF document text
    • http://alibabashipping.com/userfiles/file/37419769463.pdfIn PDF document text
    • http://www.medical-psychology.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160c9f5800af18---paruvufa.pdfIn PDF document text
    • https://robertmatzuzi-massagetherapist.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a0d6a691159---21849060054.pdfIn PDF document text
    • http://thehigh86.com/clients/13680/File/13613973106.pdfIn PDF document text
    • http://arniestribu.com/campannas/file/nisonupisonage.pdfIn PDF document text
    • https://drmiamiconnect.com/wp-content/plugins/super-forms/uploads/php/files/e0957d02963dff7e70bdf891c7470cc4/nepatemijolos.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=there+is+a+fountain+filled+with+blood+united+methodist+hymnalPDF 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_off0001785e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1785E 16524 bytes
SHA-256: a31bba4ab5eea6af75922a7e4bf60b61ac7c72b355f872ec848a07d7cc051cc4
font_01_sfnt_off0001a338.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A338 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001bb4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1BB4F 11024 bytes
SHA-256: 8b01009aacd6d504a1f74d026735103df22f0284d46d7a19de1d6b1dbfa0d340