Malicious PDF — malware analysis report

Static analysis result for SHA-256 7cc5da2672de4659…

MALICIOUS

PDF

83.9 KB Created: 2021-06-28 22:42:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 9c72c2a2a1ed35e561b6cb6314d2b42c SHA-1: 3cbc34b259f5d1a61c9f87622dccd9328905dcc9 SHA-256: 7cc5da2672de46591c9a17c875af2209ac0d6e6dbae3fa3927b198ea74fa66f9
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous external URIs and link farm patterns, indicating a likely phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were directly extracted, the PDF structure and embedded URLs point towards a malicious document designed to redirect users to compromised or malicious websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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://crysiq.ru/uplcv?utm_term=objectives+of+european+union+pdf
    • https://eduinfinite.com/wp-content/plugins/super-forms/uploads/php/files/e427b995893921b97273caaa53b45fbc/rikumanu.pdf
    • http://blueyee.com/upload/file/15134325897.pdf
    • http://abwninemile.com/uploads/files/48239513656.pdf
    • http://gostium.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075da9a25a89---sajakamaniwivifokujitesam.pdf
    • https://advantagelic.com/singhania/downloads/file/11499848726.pdf
    • https://www.webhisto.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160c2debe8092e---vadogisofigikurikojonin.pdf
    • http://www.emporiocaritaspisa.it/wordpress/wp-content/plugins/formcraft/file-upload/server/content/files/160802a26ec042---dasuxoka.pdf
    • https://amitadevnani.com/userfiles/file/fixebora.pdf
    • https://www.aceitedeoliva.com/wp-content/plugins/super-forms/uploads/php/files/ba303b98170c4dae115f8e1d5c1b2819/81860461752.pdf
    • https://uleshuzatabc.hu/files/file/kugalirixulijekasozowu.pdf
    • https://www.avenueroadadvertising.com/wp-content/plugins/formcraft/file-upload/server/content/files/160906af153703---ramiroporujixobokutoxozis.pdf
    • http://libertyquad72.fr/userfiles/file/25304579842.pdf
    • https://bursaceviritercume.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099e32fa1295---19537618312.pdf
    • http://kwik-it.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160856f2c65c33---bavipoxumu.pdf
    • https://bawwabatrizq.com/userfiles/file/25263103308.pdf
    • http://iphonedown.com/ckfinder/userfiles/files/46136239557.pdf
    • https://www.superioreagle.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b4110733d8a---pelonagok.pdf
    • https://ascinfratech.com/clientprojects/trading/file/mixedediv.pdf
    • http://fotografoenricogiampieri.it/userfiles/files/8403389113.pdf
    • https://bnovum.hu/downloads/73928247861.pdf
    • https://teenvolunteer.org/wp-content/plugins/super-forms/uploads/php/files/7d036e0904325e60469063d68c5314e0/jesezepufowukozojalek.pdf
    • https://wecafephuket.com/wp-content/plugins/super-forms/uploads/php/files/4jsuspfusff9qnoai83338q27n/22552457952.pdf
    • http://bayernglobal.de/userVZ//file/24673028985.pdf
    • http://gangwonbnb.com/FileData/ckfinder/files/20210607_51E6B15EDB02812D.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e30f.bin
ec97f08b1eb01d239b76e012c37a43f46c3d8547a3e7404a4645b79c7c42a2d0
pdf-font-stream PDF embedded font (sfnt) at offset 0xE30F 17720 bytes
font_01_sfnt_off0001108f.bin
c5325b471ad34b282eb64ce744e5d69748bf06a29c3ad4361b04271e7e6aeb90
pdf-font-stream PDF embedded font (sfnt) at offset 0x1108F 11028 bytes
font_02_sfnt_off00012a2f.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12A2F 16792 bytes