Malicious PDF — malware analysis report

Static analysis result for SHA-256 49ecdfd9169ceb96…

MALICIOUS

PDF

86.3 KB Created: 2021-08-02 12:21:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 41f9a725e9c27e5cd2a16f9743d7d8db SHA-1: a8b2115f5af364575bba42cd3fe1f28829387f6e SHA-256: 49ecdfd9169ceb96e642b7cb5b40118a49fcaf86e5cde51d6f7d1719fb6eb2fd
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to various PDF files hosted on compromised websites, suggesting a phishing or malware distribution attempt. The presence of a 'password reset' keyword in one of the URLs further supports a phishing pretext. Although no scripts were directly extracted, the PDF structure and URL patterns are indicative of malicious intent, as confirmed by ClamAV and ML heuristics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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://bodymart.in/ckfinder/userfiles/files/66382114448.pdf
    • http://moto-bike.pl/userfiles/file/wakapalewewutako.pdf
    • http://www.afamaresme.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607592ab3579b---nifaxomoxufosije.pdf
    • http://asijskepotraviny.cz/files/file/jevera.pdf
    • http://www.medicalalliedtraining.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f6df587906---wuvixivez.pdf
    • https://hinodanang.com/uploads/image/files/tugegaxabelu.pdf
    • https://dmddsgn.com/wp-content/plugins/super-forms/uploads/php/files/48ce2c85b89d4c69b68b30356392574e/28537931273.pdf
    • http://robertfeinberglaw.com/images/edit_images/file/nubegegegigezulak.pdf
    • https://asiaviews.org/wp-content/plugins/super-forms/uploads/php/files/7g782a801p93l9pcdakghm6ll2/1210539263.pdf
    • http://sziazsauto.com/uploads/files/zuwavewasikipiken.pdf
    • http://computergramm.com/userfiles/file/rokujanumib.pdf
    • http://geometrarontani.it/userfiles/files/nasud.pdf
    • https://skyfireconsulting.com/wp-content/plugins/super-forms/uploads/php/files/t1ajifpml023dfbphn6mcm8jmi/46509346062.pdf
    • https://birsamundapark.in/userfiles/files/tabegi.pdf
    • http://www.dfdtrading.sk/ckfinder/userfiles/files/nozojajege.pdf
    • http://webs123.com/userfiles/file/95253869780.pdf
    • http://clearspace-design.com/CKEdit/upload/files/todirujemupunobonubat.pdf
    • http://for-rent-antwerp.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071b27607cc5---mevexiwi.pdf
    • http://hasyo.net/files/file/tilofefewewizuna.pdf
    • http://pnktools-th.org/ckfinder/userfiles/files/73530430274.pdf
    • https://webmodeli.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cb74d84dd4---gewijifekuz.pdf
    • https://movesforfree.com/wp-content/plugins/super-forms/uploads/php/files/uhcsga2vk3e67oj0e0v55dhur3/21534412163.pdf
    • https://rhdplumbing.com/wp-content/plugins/super-forms/uploads/php/files/18c852c501be05c7de28e215a3dc6bcb/disuzox.pdf
    • http://www.mvdisposal.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076cdb9cb1f5---38908974580.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=bios+password+reset+hp+elitebook+2560p
    • 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_off0000ebca.bin
5db7aa61faf7fe7179c4a4676be4387e2c6ee157b351710f2f31c799ee0e1638
pdf-font-stream PDF embedded font (sfnt) at offset 0xEBCA 11300 bytes
font_01_sfnt_off0001066b.bin
1f64d0317cd68a131a4956de522a422324c4b355a33e9bba314954d8ab821e86
pdf-font-stream PDF embedded font (sfnt) at offset 0x1066B 16888 bytes
font_02_sfnt_off0001325d.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1325D 16792 bytes