Malicious PDF — malware analysis report

Static analysis result for SHA-256 795bf04795465d13…

MALICIOUS

PDF

102.6 KB Created: 2021-06-29 23:24:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 99d00dd4deba710791eb349e2cb08c6a SHA-1: a7263ef6ef539cbf45405f7f4a2379aa8713d683 SHA-256: 795bf04795465d131178e0f03d5fabc9b59ae3b20462acb617e820e2214b2879
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The file is a PDF that contains numerous links to compromised websites, many of which are hosted on disposable domains and utilize UTM parameters, suggesting a link farm for SEO poisoning or phishing. The presence of a 'download button' heuristic further supports a lure-based attack. ClamAV detection and ML classification strongly indicate malicious intent, likely phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9950

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://cructi.ru/uplcv?utm_term=gold+colour+in+word PDF link annotation
    • http://ontheedgeofnow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a240ef2de3---mefegixigiwogodotez.pdfIn PDF document text
    • https://www.wflorlando.com/wp-content/plugins/super-forms/uploads/php/files/2591df79ffda57f32a50aab9510069c7/dekofe.pdfIn PDF document text
    • http://ondrejkocar.cz/img/file/34778736009.pdfIn PDF document text
    • http://thegioidahoacuong.com/uploads/image/files/13884363666.pdfIn PDF document text
    • https://pinotcar.com/wp-content/plugins/super-forms/uploads/php/files/0adcb88ea698f13f722eb320d89e390e/gigixetomow.pdfIn PDF document text
    • http://curry-box-deluxe.de/userfiles/file/vifiwukarerimavatunorapos.pdfIn PDF document text
    • https://apexforestservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607df330b1399---79178112667.pdfIn PDF document text
    • https://nicemexico.net/wp-content/plugins/formcraft/file-upload/server/content/files/1609e86e71ba4b---74172582117.pdfIn PDF document text
    • https://www.sahabatkeluargahomecare.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b8a14a4420f---todiduwibegilafox.pdfIn PDF document text
    • http://cariboohose.com/userfiles/file/zisukunowaz.pdfIn PDF document text
    • http://duetsepolno.pl/userfiles/file/gajogu.pdfIn PDF document text
    • http://remproekt-m.ru/admin/ckfinder/userfiles/files/bajed.pdfIn PDF document text
    • https://luxartparquet.com/wp-content/plugins/super-forms/uploads/php/files/467dd8a66e45ac0acc8427771dcb96a2/neganidu.pdfIn PDF document text
    • http://vincityhomes.vn/wp-content/plugins/super-forms/uploads/php/files/q591e3jvth6hm5881thgf3lpgd/sitanukazolofisedefozuj.pdfIn PDF document text
    • http://fine-cottage.ru/userfiles/files/12068930560.pdfIn PDF document text
    • https://www.histoiresdegroupes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ee0f3ccb8a---peleluwolalor.pdfIn PDF document text
    • http://theloneranger.tv/clients/loneranger/ckfinder/userfiles/files/kufomadibomulubinigo.pdfIn PDF document text
    • https://mfdesign.hu/files/file/likogope.pdfIn PDF document text
    • https://cakenepal.com/userfiles/file/gitibifepikagowuri.pdfIn PDF document text
    • https://www.numberoneporthill.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160983afcaac30---83302305328.pdfIn PDF document text
    • https://www.rogierstoel.nl/wp-content/plugins/super-forms/uploads/php/files/j2g1a7031bmht46o18jgumtmsr/27743317095.pdfIn PDF document text
    • https://www.sabiamente.es/wp-content/plugins/formcraft/file-upload/server/content/files/160705adddb42d---xinivido.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012e18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E18 18128 bytes
SHA-256: 908cd02796bf3d97ac6c11a170085f5e87a76b18a7fced3f51c7da26fa92aefc
font_01_sfnt_off00015dbb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15DBB 10028 bytes
SHA-256: 01dd776c81e29cc00c8709072e6d5ab4f236bbe8a8955122af2a9e6a4020093c
font_02_sfnt_off00017410.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17410 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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