Malicious PDF — malware analysis report

Static analysis result for SHA-256 0636e36b6cbd7bfe…

MALICIOUS

PDF

92.4 KB Created: 2021-07-03 00:32:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: b0fd44a7562f9a8a8e44bbb45689f4cd SHA-1: 39313b73fc853f757cf42ef53d31db760b9ffe75 SHA-256: 0636e36b6cbd7bfef93811330d856a4c5dc1ffe2576c7054fdbda3c48a84be69
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains a link farm pointing to compromised WordPress upload storage and other disposable hosting, suggesting an attempt to redirect users to malicious content. The presence of multiple distinct hosts and a high number of links indicates a coordinated effort to distribute malware or phishing lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9822

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 https://lecormier-menuiserie.com/www/upload/files/2519713902.pdf
    • http://plncse.hu/php_data/file/50077316832.pdf
    • http://brucemsmithlaw.com/clients/e/e2/e252bfde01ef004f685a9648d307a4b9/File/pavowozamonijipuja.pdf
    • https://www.intermediastudios.com.mx/wp-content/plugins/super-forms/uploads/php/files/48b1bea6775570b89b83e704605c2ad4/takinoxuguper.pdf
    • http://sugarfree-gelato.com/upload/file/pifakiwafun.pdf
    • https://binarbaidservices.com/public_html/userfiles/file/duvofemixiwogizajagizidap.pdf
    • https://afayl.com/userfiles/file/74491327297.pdf
    • https://avis-medical.ma/wp-content/plugins/super-forms/uploads/php/files/f360206f617e21f6f94a5b636f7603a2/najideru.pdf
    • http://kochamsushi.pl/UserFiles/file/69484580168.pdf
    • https://www.c2commercial.com/wp-content/plugins/super-forms/uploads/php/files/c8334b0f46049a1a33d8161260825a4c/piremugesalu.pdf
    • http://cageart.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160aab1daeb587---39560219534.pdf
    • https://www.sidertest.it/wp-content/plugins/formcraft/file-upload/server/content/files/1609455d7cba4c---kejebemabuvu.pdf
    • https://www.teppiche-waschen-hamburg.de/wp-content/plugins/formcraft/file-upload/server/content/files/160d5e1515a7f3---biniza.pdf
    • http://www.hotel-margherita.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d07debeec2---79462295479.pdf
    • https://lisacutler.com/wp-content/plugins/formcraft/file-upload/server/content/files/160986656845df---65752902371.pdf
    • https://abe-rdc.com/userfiles/file/jatavemojisonoral.pdf
    • http://botosani.ro/img/uploads/file/53176422574.pdf
    • http://www.mondzorgvesa-voorschoten.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160c58d1b8bf1d---zajezom.pdf
    • http://aksaaydinlatma.com/img/editor/image/file/19540131744.pdf
    • https://299-45.com/CKEdit/upload/files/29076506594.pdf
    • https://beribuket.ru/wp-content/plugins/super-forms/uploads/php/files/746fbe5231170cf5b95f5578e673fca0/kuloserunopadivukabuniru.pdf
    • https://www.burit.net/wp-content/plugins/formcraft/file-upload/server/content/files/16079b7d63ad4c---63940296387.pdf
    • https://rmissio.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1607001a8a4249---26963463522.pdf
    • https://californiaoptionsrealestate.com/wp-content/plugins/super-forms/uploads/php/files/6f181ca63d48e2b3c96f4b4ba1f30695/nujopipejamoza.pdf
    • https://yidinfo.net/wp-content/plugins/super-forms/uploads/php/files/ceghgunachre9k4hm39men41ot/52755270058.pdf
    • https://securitydm.rs/slicice/file/zuwukujosofinetemufafe.pdf
    • http://m-s-g.ru/userfiles/files/beveriw.pdf
    • http://madang.eu/f_pds/fck/file/54535332042.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=impacted+tooth+removal
    • 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_off000108fc.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x108FC 16792 bytes
font_01_sfnt_off0001210e.bin
99840976eb1848d9daba1cd5e35ef3e44a9d3eef13bff5e9472ce8716e4c0cd2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1210E 16764 bytes
font_02_sfnt_off00014c98.bin
0906cb61e93ef7c68c032e48ad7eee3312a3c10eb654fcb65ef8cd428f70f012		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14C98 10432 bytes

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