Malicious PDF — malware analysis report

Static analysis result for SHA-256 72d953d3d6026f97…

MALICIOUS

PDF

100.3 KB Created: 2021-09-06 01:16:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: c4c40bd62c4e8d20d1e943ef21a9e752 SHA-1: ceeebb86aff5640a34f57f67b5bfe4ee67be72af SHA-256: 72d953d3d6026f975a3f71ea0d619f618fbf07c5c1bf90d187a3a19c31cc39aa
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as a link farm, with many URLs pointing to compromised WordPress sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. No scripts were extracted, but the embedded URLs are the primary indicators of compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9928

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://philabc.ru/uplcv?utm_term=pesticides+definition+pdf PDF link annotation
    • https://soudurelauziere.com/upload/editor/file/85512815821.pdfIn PDF document text
    • https://curewelldiabetes.com/userfiles/file/bovidobaxazumilojexute.pdfIn PDF document text
    • https://mmszke.hu/files/file/25070036485.pdfIn PDF document text
    • http://ziepniekkalns.lv/wp-content/plugins/formcraft/file-upload/server/content/files/160e5e6ac4f18b---dixiwawumuwevata.pdfIn PDF document text
    • http://lirealestatelitigator.com/wp-content/plugins/super-forms/uploads/php/files/677b503c6fbdc651e4bed3659c3ea5eb/nedurokinilagudoxas.pdfIn PDF document text
    • https://www.bouldersudbury.org/wp-content/plugins/formcraft/file-upload/server/content/files/16077f5a7cf189---pevudadiri.pdfIn PDF document text
    • http://alsumiri.net/wp-content/plugins/super-forms/uploads/php/files/50816acbfccbf535bbf8862e4118eea3/69632048310.pdfIn PDF document text
    • https://www.makathastaliklari.net/wp-content/plugins/formcraft/file-upload/server/content/files/160856fe1a6b36---97167320165.pdfIn PDF document text
    • https://senzedigicraft.com/wp-content/plugins/super-forms/uploads/php/files/5a960c37e4ae85fb0ebdbcdac6f7d956/68291166785.pdfIn PDF document text
    • http://tourbusan.net/FileData/ckfinder/files/20210610_F93BF06E72E8B45D.pdfIn PDF document text
    • http://mistralizmiryonetim.com/uploads/file/47712056707.pdfIn PDF document text
    • http://sancheonglittletheaters.com/upload/userfiles/2021/07/files/210717081600.pdfIn PDF document text
    • http://www.rebranded.tv/wp-content/plugins/formcraft/file-upload/server/content/files/160bb1a15cb504---nojudiporukixidi.pdfIn PDF document text
    • http://skup-laptopow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16120603055ff1---30280294940.pdfIn PDF document text
    • http://bluestandard.pl/ckfinder/userfiles/files/niruwunawopuzajinosaton.pdfIn PDF document text
    • http://grupogmec.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc5f27c3343---76085580425.pdfIn PDF document text
    • https://him-home.ru/wp-content/plugins/super-forms/uploads/php/files/54d7ab2967d5b33db205c482c145fd5a/66934335621.pdfIn PDF document text
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160abffa8cb3be.pdfIn PDF document text
    • http://veitali.com/upload/files/7488776676.pdfIn PDF document text
    • http://celcg.pl/uploaded/file/82833574750.pdfIn PDF document text
    • http://romengo.com/ckfinder/userfiles/files/zasazuzevobaparor.pdfIn PDF document text
    • http://www.holderit.com/wp-content/plugins/formcraft/file-upload/server/content/files/160853986b1b65---zavikasinozojob.pdfIn PDF document text
    • http://lnyuanzong.com/uploads/files/20210725115850.pdfIn PDF document text
    • https://www.cir.cloud/wp-content/plugins/formcraft/file-upload/server/content/files/1606eec8ea857c---ribukemisurod.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_off00011e16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E16 20872 bytes
SHA-256: 874a63dde4fe94c0d1ae230de7066b8f1fb83a2ba111088302d94729e4642edc
font_01_sfnt_off00015433.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15433 10304 bytes
SHA-256: 6ee6a76bd0c43cd71b974a60fedbc3848892d4020eac9a99d67335d155cda7dc
font_02_sfnt_off00016b87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16B87 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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