Malicious PDF — malware analysis report

Static analysis result for SHA-256 e048f13a859951d4…

MALICIOUS

PDF

72.2 KB Created: 2021-07-21 16:24:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 2a944f179f1f60a22b63c313bf43fb0c SHA-1: 159659074ed5517115b7be206c30f305c4522038 SHA-256: e048f13a859951d42f61151c74d9eeeea3353d3ae04adff5c28b158f51b16354
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to compromised CMS upload directories, indicating a link farm designed to redirect users to potentially malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

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://bedandbreakfastchia.it/userfiles/file/29816505890.pdf
    • http://ibiforstarlight.org/clients/3/3c/3cfcca4e360ca8807b7dd7d6e7cbeae0/File/23630610203.pdf
    • https://wcdt.co.th/wp-content/plugins/super-forms/uploads/php/files/1tag10analf41v849s37a8b4h6/20405227307.pdf
    • http://studiocalderini.it/userfiles/files/pemewajemupurivododo.pdf
    • https://africanresearchcenter.com/userfiles/file/90409861790.pdf
    • http://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607f8d38be32a---dodutojedelala.pdf
    • http://logisticsnetworks.net/ckfinder/userfiles/files/12326705861.pdf
    • http://avtoarka.ru/wp-content/plugins/super-forms/uploads/php/files/2c6ea1597826e5779d89e782a09996c7/kuned.pdf
    • https://amalighting.com/wp-content/plugins/super-forms/uploads/php/files/454dcd091e87f7f6993f3f965a2f04db/zigafefuxawanu.pdf
    • https://www.mysmilestudios.com/wp-content/plugins/super-forms/uploads/php/files/56c7f7e2ee942400c11b8853a5ee69e5/63897619718.pdf
    • http://yuseigachi.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1606cf89ab1a42---xijonevamufexuz.pdf
    • http://axwelindia.com/uploads/74149358567.pdf
    • http://creatinglifeoptions.com/userfiles/files/buvobixe.pdf
    • http://redwoodpwr.com/wp-content/plugins/super-forms/uploads/php/files/54s65rqg3n8de1tum0m3j4pbg7/kewuvodulujepuboxu.pdf
    • http://photographybynami.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075a7b0b5e23---xeliwasepelipekepo.pdf
    • http://exactblue.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083e0a0e1ca5---92046605306.pdf
    • http://flomojapan.com/upload/files/manaxete.pdf
    • https://action-roofing.com/wp-content/plugins/super-forms/uploads/php/files/93419e1831ece0fd1292d5d5a34d2252/42875190020.pdf
    • http://kenzoum.org/home/integrity/public_html/ckfinder/userfiles/files/79231219394.pdf
    • http://www.jcca.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca808690a3---xotaparuzopupej.pdf
    • http://drstevealbrecht.com/wp-content/plugins/super-forms/uploads/php/files/9774bef70e87c1c557b5cd53382cc076/tulonuzijewujoduxorenowun.pdf
    • http://elonsummerstorage.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081a9136514c---kodalogekobipamom.pdf
    • https://portsidestrategies.com/wp-content/plugins/super-forms/uploads/php/files/122b713f97efeb0e68daa7e5a58fdfa8/domom.pdf
    • https://rajatotogroup1.com/contents//files/zunidevapipijazol.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=pirates+of+the+caribbean+2+full+movie+in+tamil
    • 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_off0000bcde.bin
a298f7a18b7acaf3cea258ebb7edc6d4634c49227773b44ea3f9d91dd506573b
pdf-font-stream PDF embedded font (sfnt) at offset 0xBCDE 14260 bytes
font_01_sfnt_off0000e063.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE063 16792 bytes
font_02_sfnt_off0000f87a.bin
036235adbf860c717a1e054a0ad144cdd8db8bfddbb31048f1751d9fa04ca6c2
pdf-font-stream PDF embedded font (sfnt) at offset 0xF87A 11028 bytes