Malicious PDF — malware analysis report

Static analysis result for SHA-256 4c294f7a33f6b8bd…

MALICIOUS

PDF

94.6 KB Created: 2021-06-30 16:10:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: cfcbfd47533a096e776449f8220eb60d SHA-1: 78b6515c8000b78fede70ad3bf952cd9e591ee8e SHA-256: 4c294f7a33f6b8bdd88704fe85b251e423ee3ad2f8b3d66b222299076da46d10
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous links, many pointing to compromised WordPress sites and disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. No scripts were extracted, but the structure and URL analysis point to a malicious document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9918

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://www.molinoag.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b95fa9e9f8---10604865069.pdf In PDF document text
    • http://sip7.online/wp-content/plugins/super-forms/uploads/php/files/3e767f19b997bfcc759a797f74853094/basev.pdfIn PDF document text
    • https://pindimana.in/uploads/file/77940599246.pdfIn PDF document text
    • https://balance-global.com/wp-content/plugins/super-forms/uploads/php/files/otqvn99mk5dh9no3g91gupeo28/36033306067.pdfIn PDF document text
    • http://foire-fromages-et-vins.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077432940b3c---rozufamomijarelur.pdfIn PDF document text
    • http://www.hotel-margherita.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9fe4eb5719---5228691735.pdfIn PDF document text
    • https://regenerativetherapyforpain.com/wp-content/plugins/super-forms/uploads/php/files/786db58c77431c7e98cd6a0170f96e45/xekikarez.pdfIn PDF document text
    • https://parklanehotel.asia/userfiles/file/57238064193.pdfIn PDF document text
    • http://rialta.ie/userfiles/files/fubegufozagaranirubej.pdfIn PDF document text
    • http://cedresarquitectura.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085e578509b8---11263291336.pdfIn PDF document text
    • https://archcosmeticstudio.com.au/wp-content/plugins/super-forms/uploads/php/files/7aef885ffedb1c41aaee86fe0b9153b4/13358628027.pdfIn PDF document text
    • http://www.maarsehoveniers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1609aa1eb3e997---53980866616.pdfIn PDF document text
    • http://saamfactory.com/wp-content/plugins/super-forms/uploads/php/files/57696fc5532f22813d52e6e771eea0fa/81270208650.pdfIn PDF document text
    • https://soechi.id/userfiles/file/natatokixanoxu.pdfIn PDF document text
    • http://drstevealbrecht.com/wp-content/plugins/super-forms/uploads/php/files/62723b110de2b5bb4477638a7eb58320/78232769016.pdfIn PDF document text
    • https://jahanchart.ir/data/files/file/66997974703.pdfIn PDF document text
    • https://jxloanchien.com/style/postimage/file/70630419312.pdfIn PDF document text
    • https://deconkhoemanh.com/wp-content/plugins/super-forms/uploads/php/files/mevufq1m3hsl1r0ej48hb92si8/75085035698.pdfIn PDF document text
    • http://cesmclassof68cheyennewy.com/clients/82478/File/bodedutomaxanibuteg.pdfIn PDF document text
    • http://curry-box-deluxe.de/userfiles/file/64369445599.pdfIn PDF document text
    • http://mrbossamktown.com/uploads/files/10981839536.pdfIn PDF document text
    • https://mk-sito.it/uploads/file/67415326787.pdfIn PDF document text
    • https://whitelightdesign.com/wp-content/plugins/super-forms/uploads/php/files/d36cf0f684cd9f595ad39e1c8af762e1/sunigupos.pdfIn PDF document text
    • http://arohitourandtravels.com/userfiles/file/87906670806.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=scenes+from+a+marriage+1973PDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010242.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10242 11052 bytes
SHA-256: 22a2c70a5d73db950a8ffaca5a09c1bd0c75c008d4d9f5730f7929104882e573
font_01_sfnt_off00011c14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C14 1848 bytes
SHA-256: 3688027923f84938144486d2dd1c3cf8fbd45117cfa4826b1f34892a7d54ded7
font_02_sfnt_off0001249e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1249E 17732 bytes
SHA-256: 151490af69486d2c3d3bdfb7244a3c7aae2d498d3eace3a6b038c3c90939215d
font_03_sfnt_off00015264.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15264 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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