Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ad4010adbf37015…

MALICIOUS

PDF

76.1 KB Created: 2021-07-06 06:45:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: e615179a7139c002479d6f00b8dca882 SHA-1: 26c0d92e10e6a836b48b1377b70ac1153de83f55 SHA-256: 0ad4010adbf370155500c09c09a33f20b646f018a171e4483ba79f6cd7634ef0
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many hosted on compromised CMS platforms, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are indicative of a downloader or redirector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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://pistant.ru/uplcv?utm_term=dictionary+data+type PDF link annotation
    • https://utilitydiscount.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac16a291109---79830092500.pdfIn PDF document text
    • https://lasvegasrebath.com/wp-content/plugins/super-forms/uploads/php/files/533873ee6e17783f2ed9bff6c443b958/diranuk.pdfIn PDF document text
    • http://xedaptheduc.net/app/webroot/uploads/files/zasejagukofobaroze.pdfIn PDF document text
    • http://sochi-vitrazhi.ru/ckfinder/userfiles/files/lefivumolafatogagi.pdfIn PDF document text
    • http://www.platformliften.info/wp-content/plugins/formcraft/file-upload/server/content/files/160a6466ee6dd0---gofuzovusidogiguzetojefe.pdfIn PDF document text
    • http://insureacompany.com/userfiles/file/63935755428.pdfIn PDF document text
    • http://air-ned.com/uploads/files/tewetozuwezodofev.pdfIn PDF document text
    • https://easybuildapp.com/files/uploaded/files/zotigololaderobasipepi.pdfIn PDF document text
    • http://www.britocunhaadvocacia.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/160b8ad17d7d4b---betagorubokevibasu.pdfIn PDF document text
    • https://www.chortho.co.uk/wp-content/plugins/super-forms/uploads/php/files/mgh9fga53v21a95lfns27ld0ft/wuxotivozivej.pdfIn PDF document text
    • https://www.emmabowman.com/wp-content/plugins/super-forms/uploads/php/files/5184c8085ba4e33c9c601413f4014099/48014211898.pdfIn PDF document text
    • http://htwy.com/upload/file/vogekave.pdfIn PDF document text
    • http://urbanconstructions.org/images/uploadedimages/file/pazusas.pdfIn PDF document text
    • https://www.parkgest.ch/wp-content/plugins/formcraft/file-upload/server/content/files/16086b5b8bb899---bosawogakuxak.pdfIn PDF document text
    • http://plenaadoracao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160ba59cbab435---58659611953.pdfIn PDF document text
    • https://arihantgranites.in/wp-content/plugins/super-forms/uploads/php/files/d71gdihk2ol3jd6b19cj3je9u2/32257950224.pdfIn PDF document text
    • http://panziofabian.hu/fck_kepek/vuferokudirug.pdfIn PDF document text
    • http://sakirnoopo.ru/wp-content/plugins/super-forms/uploads/php/files/52128e70f2e75f974cfe78c4030ab561/95055725376.pdfIn PDF document text
    • http://csc020.com/userfiles/file/20210622210158_k2nv3o.pdfIn PDF document text
    • https://www.engltg.com/wp-content/plugins/super-forms/uploads/php/files/c1b678946ae154aab8d5800ef86193ed/40967625860.pdfIn PDF document text
    • https://toolsatool.com/userfiles/files/38006479971.pdfIn PDF document text
    • https://www.edutechusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dc39baca10d---49623116364.pdfIn PDF document text
    • https://n95america.com/wp-content/plugins/super-forms/uploads/php/files/592d2159676a5522278f50256e8451cd/lofutitivalunefurazi.pdfIn PDF document text
    • http://gallery4walls.com/upload/editer/file/40705841889.pdfIn PDF document text
    • 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_off0000c684.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC684 10408 bytes
SHA-256: 74d706c6bdc1161986d82b25e5bb0a46b1ad21da6b83a5f78ac452ee933179c2
font_01_sfnt_off0000de41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE41 17184 bytes
SHA-256: e1a46eb273c2650c2ddb883adcbe4f789f8740881f445dd8b15f0511b4e12254
font_02_sfnt_off00010b43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B43 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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