Malicious PDF — malware analysis report

Static analysis result for SHA-256 cfeed76e62a48da5…

MALICIOUS

PDF

84.8 KB Created: 2021-09-10 08:21:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: a54bea804ee250cf33a4a15885e88f6a SHA-1: 9adf4518d234dc9f654700e5d2b3b373bf12fd99 SHA-256: cfeed76e62a48da589ced9c732f3bfe1d445cdad9de9a498bfc0571449631b67
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised websites or disposable hosting, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or distributing further malware. No scripts were extracted, but the structure and URL patterns are indicative of a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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 http://kfnmdg.com/upfolder/e/files/20210902164944.pdf In PDF document text
    • http://gospelpour100voix.com/fichiers/newsletter/file/totideme.pdfIn PDF document text
    • https://gulertrafik.com/wp-content/plugins/super-forms/uploads/php/files/o7v20diuk7654st0494tmrds62/20045555320.pdfIn PDF document text
    • http://free-note.kr/files/fckeditor/file/9549208416133fe1232851.pdfIn PDF document text
    • https://anup.bo/images/files/fuxaxakevunixinesazusaj.pdfIn PDF document text
    • http://technestudio.eu/userfiles/files/papeb.pdfIn PDF document text
    • https://forumhrdbekasi.com/webroot/userfiles/files/wifugunon.pdfIn PDF document text
    • http://win-sonic.com/ck_imgs/files/44751767528.pdfIn PDF document text
    • https://creationstationdance.com/wp-content/plugins/formcraft/file-upload/server/content/files/16131145733735---kipekitomosop.pdfIn PDF document text
    • https://www.dynasil.com/wp-content/plugins/super-forms/uploads/php/files/b261cd1de75e9a12d4bf135329db1e99/xitubomo.pdfIn PDF document text
    • http://malagi.pl/user-files/fck/file/22374817608.pdfIn PDF document text
    • https://prtl.pl/userfiles/file/bavujifojitu.pdfIn PDF document text
    • http://megalabsrl.it/userfiles/files/mivusafemutixas.pdfIn PDF document text
    • http://muzycznescyzoryki.pl/userfiles/file/13190948594.pdfIn PDF document text
    • http://pieseautocomenzi.ro/userfiles/file/70662125102.pdfIn PDF document text
    • https://asiatravel.kg/wp-content/plugins/super-forms/uploads/php/files/d29149d4513fc1cc14d31a5d185df006/90155438698.pdfIn PDF document text
    • https://kes-stv.ru/wp-content/plugins/super-forms/uploads/php/files/b9c4137c3c27662e4e154d8d0ce26c77/17338055200.pdfIn PDF document text
    • https://stiglic.sk/userfiles/file/8263357768.pdfIn PDF document text
    • http://chrisdepanneservices.fr/Sites/cds/files/79613785692.pdfIn PDF document text
    • https://ecohort.info/userfiles/files/43545276034.pdfIn PDF document text
    • https://www.oasipizza.it/wp-content/plugins/formcraft/file-upload/server/content/files/161365833e8fa6---gesesal.pdfIn PDF document text
    • http://eros-arena-reutlingen.de/eros/userfiles/file/67230088636.pdfIn PDF document text
    • http://dinskayarealty.ru/media/file/892032472.pdfIn PDF document text
    • https://styliststudios.com/imagesTE/file/bekefegivuvafonudej.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=y+start+meaningPDF link annotation
    • 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_off0000d9f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9F5 10268 bytes
SHA-256: 1360ea5fdbb09a486363d81663c44d2cb630a7038825315e482330503cb99aad
font_01_sfnt_off0000f10a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF10A 23548 bytes
SHA-256: 274cdd146b59c2fe7b7faedddce95341b34734a84c79b76e8bb70f6f68e813d6
font_02_sfnt_off00012da4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12DA4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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