Malicious PDF — malware analysis report

Static analysis result for SHA-256 66e7089da2ae4adc…

MALICIOUS

PDF

82.9 KB Created: 2021-09-05 08:26:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 5037daf4e15bcbd5705c4697cdcc7dd7 SHA-1: d1b126705d01b88c288115c7839460a34e743d0e SHA-256: 66e7089da2ae4adc59fb43447fd710b03d29637a7a1a16ec9acf92d7922e11ed
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised WordPress installations, suggesting a phishing or redirection scheme. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to lure users to malicious sites or download further payloads. No scripts were extracted, but the PDF structure itself is used to host a link farm.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

Heuristics 6

  • 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.
  • 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 http://opalbiosciences.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa6796d0f2e---76048144967.pdf In PDF document text
    • http://gorillatheory.com/admin/upload/file/xagodenozagopizezumowa.pdfIn PDF document text
    • https://earplighting.com/wp-content/plugins/super-forms/uploads/php/files/b16ac3927e7834d678ea1f764085b61b/maxejanik.pdfIn PDF document text
    • http://moveisgarciadigital.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608cf9cd1e09e---wuxaxepijanofimog.pdfIn PDF document text
    • http://le-lemniscus-incandescent.fr/ckeditor/upload/files/77276715458.pdfIn PDF document text
    • https://cliniquemyo.com/userfiles/file/92977516708.pdfIn PDF document text
    • http://kleinschadenexperte.com/userfiles/file/nejojofo.pdfIn PDF document text
    • http://aitrans.cn/UploadFile/file/F1202105281917255090.pdfIn PDF document text
    • https://jdbailbonds.com/wp-content/plugins/super-forms/uploads/php/files/c7e2277d088374f0eceb1434a776f839/65529512607.pdfIn PDF document text
    • http://divorcefinance.nl/uploads/file/ruvipipar.pdfIn PDF document text
    • https://adbadog.com/wp-content/plugins/super-forms/uploads/php/files/2fd9bc6c2193dc6b34712a599d55fde4/24325447542.pdfIn PDF document text
    • http://pphu-joanna.pl/fckpliki/file/kudofe.pdfIn PDF document text
    • http://capitaldanceacademy.com/userfiles/files/rejolajefixodevo.pdfIn PDF document text
    • http://objetivovender.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9c459f14ad---21843309124.pdfIn PDF document text
    • https://asaptransfers.co.uk/wp-content/plugins/super-forms/uploads/php/files/kv66o86isgehl86b1tlsb3ifs7/10998714690.pdfIn PDF document text
    • http://bluebirdcanada.com/FileData/ckfinder/files/20210613_D847C6DF22EEC5B3.pdfIn PDF document text
    • https://bikidi.com/UpFiles/WebEditorFiles/file/68147283118.pdfIn PDF document text
    • http://wphs69.com/clients/1/13/13dd0a1135c99f886ff4006aa3c820ba/File/6693989162.pdfIn PDF document text
    • http://podlahypilat.cz/admin/file/53725578757.pdfIn PDF document text
    • http://crestviewshopping.abwingsmd.com/uploads/files/98650264678.pdfIn PDF document text
    • http://sooam.com/files/fckeditor/file/10300972246129cd64eeea9.pdfIn PDF document text
    • http://saharun.org/uploads/ckfinder/userfiles/files/gefuvuvisesukivujukat.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=old+testament+commentary+survey+pdfPDF 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_off0000de76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE76 17796 bytes
SHA-256: b150c712f4b784d7f2e3286fab796fad39fbd1328ad2efb692d05d93990c80d7
font_01_sfnt_off00010cb7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CB7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000124ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124CE 10992 bytes
SHA-256: 7e883847939df126710b21bbda663660feae51c485a67ece2c936f8694b9535d

Open this report in the interactive analyzer, or submit your own file for analysis.