Malicious PDF — malware analysis report

Static analysis result for SHA-256 cca209879b067cf6…

MALICIOUS

PDF

82.3 KB Created: 2021-07-02 04:20:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: e15e724be55c03f56d6cfd32aefdf439 SHA-1: 4a22dc5985172b46cc4cc64529356e5af8ec8e25 SHA-256: cca209879b067cf6e282e9fb0bfa36a78d9cf3c9c8676b0306f907c338cea057
164 Risk Score

Malware Insights

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

The PDF contains numerous links to external resources hosted on compromised WordPress sites, suggesting a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent. The presence of a 'download' button lure further supports the phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://workprohealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c46ec35ed0---78734388374.pdf
    • http://www.viksexteriors.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b4de2a943f9---50503472422.pdf
    • https://socialchangefactory.org/wp-content/plugins/super-forms/uploads/php/files/193f67d3835f12eb47cca07b921eb685/68756110272.pdf
    • http://www.everhouse.lt/wp-content/plugins/formcraft/file-upload/server/content/files/16098c193a8b7e---xadawobomutuxuvuna.pdf
    • https://cowichanmusicfestival.com/userfiles/file/12560234314.pdf
    • http://aggengr.com/uploads/CMS/file/8069200184.pdf
    • https://www.hed-endo.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160cd88b876043---72770095383.pdf
    • http://eduomania.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a80fdd2521b---54707081975.pdf
    • http://www.atrium-tuiles.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c2b9a003bb0---51038290153.pdf
    • http://boekenwinkelindex.nl/images/uploads/seruxalilazarepufikozogav.pdf
    • https://naseeha.org/wp-content/plugins/super-forms/uploads/php/files/c411954e6c6eac9ad9cfd0ff5867c214/6094079558.pdf
    • https://sketchup360.vn/wp-content/plugins/super-forms/uploads/php/files/k1ec2aaeoj2uljrdageeqafgf6/95328680321.pdf
    • https://itracmediav5.com/ckfinder/userfiles/files/xijokomad.pdf
    • https://rlvanstory.com/wp-content/plugins/super-forms/uploads/php/files/6daebbe615f033efd8f78c5820b911cc/96105695684.pdf
    • https://www.andimoda.com/wp-content/plugins/super-forms/uploads/php/files/22a5a012f389f326af47f343d6b6db62/dilizeto.pdf
    • http://entryexpress.online/chapter_images/files/wefebuvolevovexatadumipu.pdf
    • http://trenermichal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1607a43baac25f---64211889129.pdf
    • http://hamdard.com/hamdard/app/webroot/img/ckfinder/userfiles/files/62564883713.pdf
    • http://cayxaotamphan.net/userfiles/image/file/vovilafumit.pdf
    • http://www.driftime.ee/wp-content/plugins/formcraft/file-upload/server/content/files/160be6c57bc902---52834107874.pdf
    • https://siphouse96.com/wp-content/plugins/super-forms/uploads/php/files/d8581554f6339773f7cb190c652d5d99/zixabakofijezopupijive.pdf
    • http://expertsystemgroup.com/file_media/file_image/file/36256798495.pdf
    • https://yastudio.net/wp-content/plugins/super-forms/uploads/php/files/f98489707738a4da245a535342e6799c/21001424518.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=context+clues+worksheets+multiple+choice
    • 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_off0000df77.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDF77 16792 bytes
font_01_sfnt_off0000f789.bin
ed48e1240a3fbce3043880bd73b0a00e17eb9f41f2fd66b94b82786e87c3a33b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF789 16708 bytes
font_02_sfnt_off000122cc.bin
351f8ad995757c9cf21c8bc33214dc5613f131a269297933de6896704025a104		 pdf-font-stream PDF embedded font (sfnt) at offset 0x122CC 10888 bytes

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