Malicious PDF — malware analysis report

Static analysis result for SHA-256 978b7f8210e2f343…

MALICIOUS

PDF

89.4 KB Created: 2021-09-02 01:20:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 65059db85819c58e5c914eca6137dcfc SHA-1: 30faad9678db89ca87506d2bfb8e3fa3b3871275 SHA-256: 978b7f8210e2f343cc13513150360d3c7936bb96c2ecd18b2350fdb09bb63983
156 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains a link farm pointing to multiple compromised CMS upload storage locations and disposable hosting, indicating a phishing or malware distribution attempt. The document body is heavily obfuscated and unreadable, providing no further context.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

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 http://lica-mpt.it/userfiles/files/57509315946.pdf In PDF document text
    • https://alakharia.com/public_html/userfiles/file/98958831903.pdfIn PDF document text
    • http://ashioke.com/images/library/File/10536121938.pdfIn PDF document text
    • https://www.stamfordtaxis.com/wp-content/plugins/super-forms/uploads/php/files/r5l5c3okd2pe72dve89u294blk/wawasevebitoraxaneriwemaj.pdfIn PDF document text
    • http://vin-baietii.ro/ckfinder/userfiles/files/94623038422.pdfIn PDF document text
    • http://travelport.pl/userfiles//file/90798273457.pdfIn PDF document text
    • https://adreshosting.com/calisma2/files/uploads/43513914118.pdfIn PDF document text
    • https://www.lumisolar.pe/wp-content/plugins/formcraft/file-upload/server/content/files/161154b0737176---venod.pdfIn PDF document text
    • http://cnp-inc.com/ckupload/files/1850737746.pdfIn PDF document text
    • https://www.phoenixdentalacademy.co.uk/wp-content/plugins/super-forms/uploads/php/files/03ca7437c0a6a774bb1ab25b4242ab3c/80034892263.pdfIn PDF document text
    • http://baaningdoi.com/file_media/file_image/file/56636797744.pdfIn PDF document text
    • http://tasteofruraleurope.eu/upload/File/67160121676.pdfIn PDF document text
    • https://www.digitalsofts.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e93d0c08e4d---68613618035.pdfIn PDF document text
    • https://progin.ch/ckfinder/userfiles/files/vatonixoduzukol.pdfIn PDF document text
    • http://jenan.com/ckfinder/userfiles/files/tanalaxukekajes.pdfIn PDF document text
    • https://messianic.live/wp-content/plugins/super-forms/uploads/php/files/fc964d1818f43a6c3110b414e407ae4a/28283247912.pdfIn PDF document text
    • https://www.medicalart.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160752d2dc7b0f---59956731003.pdfIn PDF document text
    • http://recrute.fr/files/files/91428036954.pdfIn PDF document text
    • http://nyett.hk/uploads/news/files/28699284997.pdfIn PDF document text
    • http://www.naturapreserved.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c557ef8cbf9---pebubex.pdfIn PDF document text
    • https://www.pietri-automobiles.com/wp-content/plugins/super-forms/uploads/php/files/rlmifvv03ukr29t6c8p0hkamkl/51179515947.pdfIn PDF document text
    • http://eska-lift.ru/userfiles/file/69415283971.pdfIn PDF document text
    • http://www.nuricomuvakfi.org/wp-content/plugins/super-forms/uploads/php/files/6ma3igsqcm7fvupj6gncbgc003/7545679221.pdfIn PDF document text
    • http://anhbanglaw.com/userfiles/file/wukexubekorejidovu.pdfIn PDF document text
    • https://www.modianodesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b6f3dd21372---76532685435.pdfIn PDF document text
    • http://tonioloclaudio.it/userfiles/files/tatanixiz.pdfIn PDF document text
    • https://www.pferde-fuer-unsere-kinder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160f680976424d---wibilexuwagojixibekon.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=nadaguides+used+carsPDF 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_off0000fcd8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCD8 10256 bytes
SHA-256: 4a2b23d8f8e9d8eb4f381c413d4869ea063c73d7e6e4090c0b026057275265b6
font_01_sfnt_off000113c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113C2 16928 bytes
SHA-256: 6fa79b8c52b88319510e1ce3fbcec13cd7b72327c141a62906cc7ac7615ca205
font_02_sfnt_off00013f7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13F7A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1