Malicious PDF — malware analysis report

Static analysis result for SHA-256 04bd145715fb1b37…

MALICIOUS

PDF

74.4 KB Created: 2021-07-01 17:04:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 1201dea680e92f3bae9448babeb29b4b SHA-1: dd4f26e52a14b362603661dd9acb540f17e071a6 SHA-256: 04bd145715fb1b37ffd7603c40dcbd078c9b9d3e9779b72693961a204da5c2d7
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to external websites, many of which are hosted on disposable domains or compromised CMS uploads, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery via these external links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://ekonopuntos.com/campannas/file/seloxukedoxeri.pdf
    • http://iaestedresden.de/userfiles/file/depepiw.pdf
    • http://ggmtc.net/userfiles/files/dobulafivulapipukejuxetu.pdf
    • https://www.wflorlando.com/wp-content/plugins/super-forms/uploads/php/files/33c6eaee198ca1a4ec228e1a99969c3c/rilikeletibikagima.pdf
    • http://wagnerfamilyreunion.com/clients/866685/File/43921372009.pdf
    • http://baharemadinah.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c2b9c95b156---beruzasivezo.pdf
    • http://fisioterapiasuzzara.it/userfiles/files/49559641256.pdf
    • https://htfcompact.com/wp-content/plugins/super-forms/uploads/php/files/7841b9aff264b1fe1f9d24522053f7ea/34988066878.pdf
    • http://bazatalty.pl/wp-content/plugins/super-forms/uploads/php/files/d254befc61c404e1284e10642ff46e5a/dumaditopatelelemarevi.pdf
    • https://flyags.com/editorResources/file///sirefafinixuka.pdf
    • https://akproauto.com/nbloom/fckuploads/file/pivilo.pdf
    • https://championsforchildren.org/wp-content/plugins/super-forms/uploads/php/files/a2048f9554abf768e1822a1a8d50b581/4892241149.pdf
    • https://lightsourceindiana.com/wp-content/plugins/super-forms/uploads/php/files/a631124807821a7e9c4c9aa63cef5371/mimusuwepaxexavusex.pdf
    • https://provisionsinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/160be8fab59760---vakirutudo.pdf
    • https://www.lumisolar.pe/wp-content/plugins/formcraft/file-upload/server/content/files/160b3762ab58c8---75486190484.pdf
    • http://aeronautike.com/userfiles/file/24806003923.pdf
    • http://dinskayarealty.ru/media/file/19467606435.pdf
    • http://verkoop-je-wagen.be/wp-content/plugins/formcraft/file-upload/server/content/files/160adbf1d38bd4---vekilarakepo.pdf
    • http://ligonfamilyreunion.org/clients/9/9a/9a44987365eba454cd9b2deda39aa7c0/File/79089508903.pdf
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c5d8f46a9a3---22100597251.pdf
    • https://ceilford.org/wp-content/plugins/super-forms/uploads/php/files/5b0c0fa36a842940e1da8a1c7a9b1327/35398927774.pdf
    • https://regeneracion-capilar.com/wp-content/plugins/super-forms/uploads/php/files/3537709c647fb64563161aceb51f8d15/lejirabati.pdf
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/lpacepj2qgt9tuogpk1sbroob6/losadupagobawodopiw.pdf
    • http://amajyuku.com/files/files/nejumebuvesironexiju.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=shame+in+the+moon
    • 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_off0000c063.bin
d9a2147b3871fc3a1f213f9be4b30e58182dccb7ee5bb3d1a624fa68be95747d
pdf-font-stream PDF embedded font (sfnt) at offset 0xC063 10132 bytes
font_01_sfnt_off0000d6d6.bin
ba4a0d5c684e6432b17b2f27565fd1ed62e35bf825dbd9ed735501ecc98b5254
pdf-font-stream PDF embedded font (sfnt) at offset 0xD6D6 17080 bytes
font_02_sfnt_off00010309.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x10309 16792 bytes