Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e7ecd2121f8908e…

MALICIOUS

PDF

89.8 KB Created: 2021-08-25 16:03:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-23
MD5: fbad82d7d40aa2017f293d8020f50782 SHA-1: e272602fbf41ade9aa083aacd0b816fb6a987890 SHA-256: 5e7ecd2121f8908e13b77cef86d2495275382e373bb9afac6d084390b9fecf7c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9558

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://svs-pm.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc6999f7dc---51626419320.pdf In PDF document text
    • https://www.karavanlakesfet.com/wp-content/plugins/super-forms/uploads/php/files/f3c320a36a2d788f684fd5f36d30a996/32514916478.pdfIn PDF document text
    • http://bibliotekaludwin.pl/img/upload/files/15072854833.pdfIn PDF document text
    • http://watthaistuttgart.de/userfiles/file/9313470331.pdfIn PDF document text
    • http://aaykpn.com/uploads/editor/files/91279640919.pdfIn PDF document text
    • http://halvani.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc610f63d52---jekevi.pdfIn PDF document text
    • https://essaidafm.com/uploads/FCK_files/file/kosoxokazepapojugokiwuni.pdfIn PDF document text
    • http://famcareconnect.org/wp-content/plugins/formcraft/file-upload/server/content/files/160be3359859c6---64824402055.pdfIn PDF document text
    • http://bluecars.pl/userfiles/file/73481737068.pdfIn PDF document text
    • http://susutour.com/userfile/file/kozoruzuwoxaw.pdfIn PDF document text
    • https://elitteaccesorios.com/wp-content/plugins/super-forms/uploads/php/files/prc8oh3j687jbenp5nplhsqs0u/85997895265.pdfIn PDF document text
    • https://isleo.com/i_photos/file/61908817538.pdfIn PDF document text
    • http://www.farparts.cl/wp-content/plugins/formcraft/file-upload/server/content/files/1606ee76d0293f---53798118122.pdfIn PDF document text
    • http://adoriantarla.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160a6d93747999---38090611409.pdfIn PDF document text
    • http://colantuono.it/userfiles/files/kalusalolozetena.pdfIn PDF document text
    • http://muszempilla.com/files/file/subulamapota.pdfIn PDF document text
    • http://escuelasfutbol8.com/docs/files/jinuxu.pdfIn PDF document text
    • http://longhornrings.com/clients/0/08/08da48574b41509ac7bedcf2500dc652/File/86027245343.pdfIn PDF document text
    • http://mobilenmr.com/files/files/86449158114.pdfIn PDF document text
    • http://df-foundry.net/d/files/77180855289.pdfIn PDF document text
    • https://www.ciabrini-immobilier.com/wp-content/plugins/super-forms/uploads/php/files/qrn63anr5073p7au1eu4k4f1gd/vusonasutizexuropazo.pdfIn PDF document text
    • http://language-coach.pl/uploads/files/wimid.pdfIn PDF document text
    • http://vp-dmsh.ru/admin/ckfinder/userfiles/files/levepalawerigipolerevako.pdfIn PDF document text
    • https://ahl2005.com/ckfinder/userfiles/files/57262678130.pdfIn PDF document text
    • https://arrayamed.com/userfiles/file/27276073617.pdfIn PDF document text
    • https://www.coconutlodge.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ec4a632274a---20682136735.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=list+of+75+books+removed+from+the+bible+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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off0000ebf3.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xEBF3 16436 bytes
SHA-256: 3d23aefbdfc414f4cb4ce0879445988f2069eb5ad2ee63bd62cf29d19a7722cb
font_00_sfnt_off0000d3e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3E2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000102ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102AB 10936 bytes
SHA-256: 70b6d76a05ea0c2b7271a4b7cf5164529e5574700aa71a69424bcab931600567
font_03_sfnt_off00011be8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BE8 19276 bytes
SHA-256: b6c5cef8013ee401caef54e806334a5f0550bc4824745d4afebf4ee3e616fc3a
font_04_sfnt_off00014eea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14EEA 2184 bytes
SHA-256: d7ab6244081fd13c626ba144e5e47358a47c39e20008b16a1a4eadf0e25b3e56

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