Malicious PDF — malware analysis report

Static analysis result for SHA-256 e767778dc68de8f2…

MALICIOUS

PDF

219.9 KB Created: 2021-08-27 08:28:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: aa07cdbe66a2e490a2f2c96a51111dc8 SHA-1: 867ab1a09801de34b62c3f97b324cd153f2cb449 SHA-256: e767778dc68de8f282e191fac18b3dadba41e0d46c50f1fb81929876e6fd3cb6
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to compromised WordPress sites and other domains, likely serving as a link farm for malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically a phishing or trojan distribution campaign. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to redirect users to download further malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9849

Heuristics 5

  • 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.
  • 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://mintaialuminum.com/d/files/90902774293.pdf In PDF document text
    • http://alibabashipping.com/userfiles/file/badun.pdfIn PDF document text
    • http://gorisum.net/fckeditor/upload_file/file/11008808930.pdfIn PDF document text
    • https://globalazeri.az/wp-content/plugins/super-forms/uploads/php/files/m32k7h4dfouluafeugp429n0j7/kakaxaf.pdfIn PDF document text
    • http://bridgesonthepark.com/wp-content/plugins/formcraft/file-upload/server/content/files/160746c1ede6d7---78904304341.pdfIn PDF document text
    • https://bagstyle.uz/images/file/fubisefino.pdfIn PDF document text
    • http://muzeumostrowiec.pl/obrazy/file/44472888759.pdfIn PDF document text
    • http://usagimatur.com/files/others/dutujunawadogala.pdfIn PDF document text
    • https://cissud.com/uploads/ck_editor/files/3948702450.pdfIn PDF document text
    • https://www.audifonosdoshoydos.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606e2e083aba7---fodavamonelarololaxi.pdfIn PDF document text
    • http://esrafisek.com/images_upload/files/46935764442.pdfIn PDF document text
    • http://ixtvs.de/_upload_bilder/_filemanager/file/9806830750.pdfIn PDF document text
    • http://meruzhankhachatryan.com/app/webroot/files/file/ratebuxejadisaruzalore.pdfIn PDF document text
    • http://erkerlaender.de/wp-content/plugins/formcraft/file-upload/server/content/files/160fdb1cb27c75---medesevax.pdfIn PDF document text
    • https://tocgia247.com/wp-content/plugins/super-forms/uploads/php/files/1lsq3pcg05tk7kfc83t2lod9pf/32138501954.pdfIn PDF document text
    • http://grupogmec.com/wp-content/plugins/formcraft/file-upload/server/content/files/160877f9b51fd6---46973633756.pdfIn PDF document text
    • http://prttour.ca/FileData/ckfinder/files/20210614_F1FD188016A227D7.pdfIn PDF document text
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/82d48c38c5e0ee14321070a35c48b4c0/80912876324.pdfIn PDF document text
    • http://www.pranabkumar.com/fckimages/file/goxarifipate.pdfIn PDF document text
    • https://alubiasdetolosa.com/files/galeria/files/71827285998.pdfIn PDF document text
    • http://lilit-realty.com/wp-content/plugins/super-forms/uploads/php/files/29608phq4sgn9p08fuogi6fhg4/85085934234.pdfIn PDF document text
    • https://www.audifonosdoshoydos.com/wp-content/plugins/formcraft/file-upload/server/content/files/160be82fd6e6de---98951050193.pdfIn PDF document text
    • http://srihemkuntsahibfgp.org/hemkunt/userfiles/file/jevupipizepakazegininegad.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=new+headway+elementary+4th+edition+pdfPDF 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_off0002fbdc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FBDC 19312 bytes
SHA-256: 84c6a9afc88ee2c460bc93491c3377a6b16a1dfee0f5bd70379ac5524d41467f
font_01_sfnt_off00032f80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x32F80 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00034797.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x34797 10848 bytes
SHA-256: f41b46bab976fc04e7dd3401bb5e49f19678871b6b32eaa2e0594694922afee6