Malicious PDF — malware analysis report

Static analysis result for SHA-256 fbc65b0057d4900a…

MALICIOUS

PDF

83.8 KB Created: 2021-09-07 05:13:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: d99330c56529060b4a3c52c66aa7d4e3 SHA-1: 0eb012657d0dc9949f5a76ebec8d59cbbf2d32df SHA-256: fbc65b0057d4900a5385925e15969cb17fde545eb54457b9443b620e7b76faec
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It functions as a link farm, containing numerous URLs pointing to potentially compromised WordPress uploads and disposable hosting sites. The primary goal appears to be redirecting users to external resources, likely for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://samsungdvmklima.com/upload/ckfinder/files/67226164293.pdf In PDF document text
    • https://ivanda-commerce.hr/userfiles/file/fifinitobagutokoku.pdfIn PDF document text
    • https://jdbailbonds.com/wp-content/plugins/super-forms/uploads/php/files/a7a007c91a7f4f3f96f23c9619c718e0/30511743085.pdfIn PDF document text
    • http://lpsa.cz/userfiles/file/82813522827.pdfIn PDF document text
    • http://fcvperu.org/data/fcvperu/userfiles/file/15418083577.pdfIn PDF document text
    • https://shreenathtechnologies.com/userfiles/file/bowikubaderesule.pdfIn PDF document text
    • http://joy05.com/_UploadFile/Images/file/guwanonadisekoweworaka.pdfIn PDF document text
    • http://cnex.cc/images/blog//file/losutozupolupiza.pdfIn PDF document text
    • http://101-games.ru/images/uploads/files/60848980966.pdfIn PDF document text
    • http://www.naturapreserved.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087a1e8ee2f3---zunemasil.pdfIn PDF document text
    • http://theettiaresmontreal.com/clients/f/f0/f03dfc1790708d0b03c48e9879ef2ea6/File/fofixivukibudenimanipome.pdfIn PDF document text
    • https://vleek.com/uploads/files/zopolimogepofifeg.pdfIn PDF document text
    • https://topclassgardening.nl/images/file/dizegewizo.pdfIn PDF document text
    • http://www.tobywells.org/media/fckdir/file/vanelofovokuwedidajej.pdfIn PDF document text
    • http://architettorobertafasola.eu/userfiles/files/49984542928.pdfIn PDF document text
    • https://strechybenesov.cz/content/65402361791.pdfIn PDF document text
    • https://www.amiunaorchestra.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16071318fd8456---mazudigaref.pdfIn PDF document text
    • http://allaboutdowney.com/userimages/bedefof.pdfIn PDF document text
    • https://xn----9sbccjdbca7cyaieg1a3j.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/597cfe9f977a4147159176681bb6e587/zixomopotadesiwu.pdfIn PDF document text
    • http://cleannshieldflorida.com/wp-content/plugins/super-forms/uploads/php/files/9bef485370a29f630861941efbc6b768/56104261410.pdfIn PDF document text
    • https://ercrs.org/wp-content/plugins/super-forms/uploads/php/files/tlou3a9nv1hvvfmu8751upsd4q/40728978983.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/1609c4f8a60dc8---wimapofenefusoxepolazeg.pdfIn PDF document text
    • https://www.geosuiteonline.de/wp-content/plugins/formcraft/file-upload/server/content/files/1611b313777429---pifogekoxapikomopopujuso.pdfIn PDF document text
    • http://www.ibadirect.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c104c311237---rabafesoviwavitiboxi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=black+butterfly+wattpad+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_off0000df9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF9C 18876 bytes
SHA-256: 122f8aff1c6666d62c7cfbcb81e3c39bc9429daaf0f28f7459619a4b9d3a9894
font_01_sfnt_off000110b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110B4 10712 bytes
SHA-256: db52e93b9987bf29d86333b3254447c3e62bc2f44f5f0ddb072b84bc2e23afad
font_02_sfnt_off00012964.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12964 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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