Malicious PDF — malware analysis report

Static analysis result for SHA-256 08cda67982bf0368…

MALICIOUS

PDF

71.9 KB Created: 2021-09-28 19:25:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 4d82af627c217efa40ecc9dfda136896 SHA-1: 06c0f06b3504ade08d957e87bcf1a0e2222f979f SHA-256: 08cda67982bf03680b94907247242ea65c7e03f04fd0bac52877a230086093ad
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded URLs pointing to compromised WordPress sites and other disposable hosting, suggesting a link farm designed to redirect users. The heuristic 'SE_QR_LURE' indicates the document may instruct users to scan a QR code, a common phishing tactic. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest it's used as a lure for further malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9909

Heuristics 7

  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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://cructi.ru/uplcv?utm_term=pdf+hp+lovecraft PDF link annotation
    • http://mindentudor.hu/userfiles/file/45521157225.pdfIn PDF document text
    • https://investmentskillsgroup.com/images/userfiles/file/37999659821.pdfIn PDF document text
    • https://lexcochoralsoc.org/demo/lccs/beta/userfiles/files/wotivaninixafaxukuwu.pdfIn PDF document text
    • http://ambiance-cinema.fr/wp-content/plugins/super-forms/uploads/php/files/e34e30e69eedaca36113f5f17e3e9488/78809644085.pdfIn PDF document text
    • http://divapharma.com/uploaded/file/panaxojakaxezaz.pdfIn PDF document text
    • http://lso-msm.com/userfiles/file/jawegefaduxoj.pdfIn PDF document text
    • https://sakesushimn.com/userfiles/files/14398661164.pdfIn PDF document text
    • http://neboskreb-irk.ru/uploads/userfiles/files/fogub.pdfIn PDF document text
    • https://xn--bren-mgenwil-gcbf.ch/sites/default/files/fck-uploads/file/6170547740.pdfIn PDF document text
    • http://chroscina.com/userfiles/file/47246835040.pdfIn PDF document text
    • https://wita.lt/images/files/98389377058.pdfIn PDF document text
    • http://ekstelekom.com/userfiles/file/bujawojarigerit.pdfIn PDF document text
    • http://hanasushichoice.com/uploads/files/45504608912.pdfIn PDF document text
    • http://an-ocn.ru/ckfinder/userfiles/files/xedupemiponefifusedi.pdfIn PDF document text
    • https://gencatakan.com/upload/file/todafeb.pdfIn PDF document text
    • http://zhengfutz.com/v15/Upload/file/2021919216168592.pdfIn PDF document text
    • http://www.next-conseil.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16151894893197---76599502524.pdfIn PDF document text
    • https://prestinireedcorp.com/userfiles/files/27811438091.pdfIn PDF document text
    • http://mountmedpharmacy.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1613472c6b826d---besuwozamivagube.pdfIn PDF document text
    • https://ldoris.com/upfile/files/20210925002148.pdfIn PDF document text
    • http://proxima-design.cz/files/file/79692909729.pdfIn PDF document text
    • https://piti.leaddeehub.com/userfiles/files/mibemipukefogudo.pdfIn PDF document text
    • https://kapokcmassage.com/uploads/files/202109020043351230.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/1612fe9101b56d---nebediwifozajukukivozu.pdfIn PDF document text
    • https://www.sgestrecho.es/wp-content/plugins/formcraft/file-upload/server/content/files/16136fa86b3d7c---52014220918.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614fda4a75567---wokujomofo.pdfIn PDF document text
    • http://pretaporter-pegah.com/userfiles/file/5608091625.pdfIn PDF document text
    • 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_off0000b7e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB7E8 16564 bytes
SHA-256: e9b7bcfbb4eb4318aa5ad674f0f3941dd84c90fc8287523e3c87c308ec6f5e4b
font_01_sfnt_off0000e1bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1BF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f9d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9D6 10420 bytes
SHA-256: c53fbc3ea594c41962d499c64e97910e5239dbdbcc4dbcddc01a357f3648e7df

Open this report in the interactive analyzer, or submit your own file for analysis.