Malicious PDF — malware analysis report

Static analysis result for SHA-256 caa5c42185149a35…

MALICIOUS

PDF

108.3 KB Created: 2021-07-02 12:30:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 7e63ff864ff462fcfa90c99eb3229ff3 SHA-1: 47ab1c1f1ce092a4318ae63ad32a76112867bc5c SHA-256: caa5c42185149a350fda262a676868dcd9a8bf421614a461ba7958c4b048e633
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links, many hosted on compromised WordPress sites using the Formcraft plugin, suggesting a link farm designed to redirect users. While no scripts were explicitly extracted, the nature of the links and the detection indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9746

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://iideree.org/wp-content/plugins/formcraft/file-upload/server/content/files/16099c3a095cc3---tulekipiw.pdf In PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c111337543d---radatekodejixadaxol.pdfIn PDF document text
    • http://mjacz.cz/soubory/files/vumiwuno.pdfIn PDF document text
    • http://manufim.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/1608416d37ba15---povitubasukewek.pdfIn PDF document text
    • http://alarcon-v.com/editor_upload_image/file/xajatofanokeka.pdfIn PDF document text
    • http://pantryscan.com/123cars/imagefck/file/56578460027.pdfIn PDF document text
    • http://www.next-conseil.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1607329058a171---77251440009.pdfIn PDF document text
    • https://nobleanimalsanctuary.org/wp-content/plugins/super-forms/uploads/php/files/tmp/69520923759.pdfIn PDF document text
    • https://gulertrafik.com/wp-content/plugins/super-forms/uploads/php/files/3ub41c44ume7unjv3qhk4re8oo/18850163618.pdfIn PDF document text
    • https://emergent-partners.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085953a346a7---38650253526.pdfIn PDF document text
    • http://project-lovcen.me/userfiles/file/fabujisewoder.pdfIn PDF document text
    • http://graphicon.hu/wp-content/plugins/formcraft/file-upload/server/content/files/1607d4f26e5a7c---rivovemoriwe.pdfIn PDF document text
    • https://envomask.com/wp-content/plugins/super-forms/uploads/php/files/2c0cd7975c10e3e8418d5f74e71188c4/jidujigorixej.pdfIn PDF document text
    • http://gidaero.com/upload/fckeditor/file/mokapaxabebekos.pdfIn PDF document text
    • http://www.advancedevents.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160921607017a9---65710098637.pdfIn PDF document text
    • http://mountmedpharmacy.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160b05bbc9e81d---56887611552.pdfIn PDF document text
    • http://www.playerclub.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160b5bded18e4f---boxedik.pdfIn PDF document text
    • http://willtorock.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607452b7abe00---9342881108.pdfIn PDF document text
    • http://pospatrans.cz/UserFiles/File/45830998862.pdfIn PDF document text
    • http://systemsbiology.at/uploads/assets/file/lixavuroruvofo.pdfIn PDF document text
    • https://specialbrands.gr/wp-content/plugins/super-forms/uploads/php/files/3d0d91a7284d28d4240a005cb0455ffe/dakidejagivegefeb.pdfIn PDF document text
    • http://2girlstrippin.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ef13e8d32c---38547130170.pdfIn PDF document text
    • https://coachtourbusrental.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ecdc9a1053---supelilamebazizavu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=c%23+join+string+arrayPDF 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010dbc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DBC 31476 bytes
SHA-256: 399a8043927aa47f9450b6a4f9b5d48ec293d5f0e7980eb3c41a0b0a1715cba7
font_01_sfnt_off0001588f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1588F 928 bytes
SHA-256: 3c15da991b16fcc268d8d33266f0982d2616c8d8d09e4e64322fdaef7a2d7494
font_02_sfnt_off00015f7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15F7D 16984 bytes
SHA-256: fa133159517f2a6d0f2f6931ee77b5db1d69995af6ad61ccf6e639b7a049a06b
font_03_sfnt_off00017878.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17878 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_04_sfnt_off0001908e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1908E 9104 bytes
SHA-256: fe4a9ad32d6d12da45ce8861a1e6e511df5579fd33367a5c4d1c9e774d301804

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