Malicious PDF — malware analysis report

Static analysis result for SHA-256 f7569636cc8f08bd…

MALICIOUS

PDF

70.1 KB Created: 2021-09-25 06:53:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 199e0c3ac76b6427b020a6864dd22c6c SHA-1: 2ee0ac322f012c3ea7488507be5fc323c3b2175c SHA-256: f7569636cc8f08bdee835191452f3147994d80edfb931a11bd45695c67433e71
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains a link farm pointing to multiple compromised websites, likely to trick users into downloading malicious content disguised as a game mod. The presence of external URIs and link farms on disposable hosting suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9837

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://wu-pao.com/upfiles/editor/files/86197166804.pdf In PDF document text
    • http://www.ncstarim.com.tr/wp-content/plugins/super-forms/uploads/php/files/4a2j6g0o5prdjiur7ehcu4sj54/vowijurutugulovun.pdfIn PDF document text
    • http://kriosispl.com/cote_dor_import/admin/ckfinder/userfiles/files/12772027925.pdfIn PDF document text
    • http://fernandopelosini.it/userfiles/files/93617098141.pdfIn PDF document text
    • http://trlgpc.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/xalisebujiginulo.pdfIn PDF document text
    • https://juniorclublivorno.com/sitonews/images_upload/files/kujikil.pdfIn PDF document text
    • http://www.risingstars.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1614a2a814612a---57521340489.pdfIn PDF document text
    • https://lux-ride.com/home/u4-6pzgszajsb5u/www/lux-ride.com/public_html/ckeditortest_WORKING/ckfinder/userfiles/files/38713572285.pdfIn PDF document text
    • http://giteduguedesboires.fr/userfiles/file/vujozufokil.pdfIn PDF document text
    • http://duocmyphamcongty.com/app/webroot/uploads/files/98446422159.pdfIn PDF document text
    • http://pospatrans.cz/UserFiles/File/lodafiwitudopopagib.pdfIn PDF document text
    • https://ka-base.no/images_content/file/50448850229.pdfIn PDF document text
    • https://hobbypet.cz/files/file/saxisafo.pdfIn PDF document text
    • http://www.mariabeckmann.com/fotos/uploads/files/53625506493.pdfIn PDF document text
    • https://partroyfuneralhome.com/partroy/assets/file/90137670055.pdfIn PDF document text
    • http://queuemanagementsystems.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614bb5121ff48---41450402140.pdfIn PDF document text
    • http://www.leasebridge.com/CKUPimg/files/liziwaku.pdfIn PDF document text
    • http://nordicwalkingturak.hu/_user/file/sexirudedijevawijiziwi.pdfIn PDF document text
    • https://www.vibrationmonitoring.asia/wp-content/plugins/formcraft/file-upload/server/content/files/161465b6f2f53a---17908779651.pdfIn PDF document text
    • https://relleno-acidohialuronico.com/wp-content/plugins/super-forms/uploads/php/files/1a276bea1306ff728e56725925e45462/73208000920.pdfIn PDF document text
    • http://retroldn.com/userfiles/file/14340257592.pdfIn PDF document text
    • https://www.sir.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/161304d7d60ae9---3029730218.pdfIn PDF document text
    • http://tele-fonika.pl/upload/file/83774721660.pdfIn PDF document text
    • http://mamolenasnc.it/userfiles/files/perazalusibazesaze.pdfIn PDF document text
    • http://isagenixmakessense.com/ckfinder/userfiles/files/20741504377.pdfIn PDF document text
    • https://fundacionamigosdelmarcaribe.ong/ckfinder/userfiles/files/50359589606.pdfIn PDF document text
    • http://oecschool.com/userfiles/file/supogufe.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=download+mod+gunship+battlePDF 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_off0000b4ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB4BA 11064 bytes
SHA-256: c1758622673866a73f95e2f3316d9afe82851bd0d9ad85c102afe1e31dec8ebe
font_01_sfnt_off0000cde9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDE9 14508 bytes
SHA-256: 6a7cb175512d0fb98f6ca52224a855905800056321542c9d23f0b8be08fad301
font_02_sfnt_off0000f26c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF26C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1