Malicious PDF — malware analysis report

Static analysis result for SHA-256 f4b7d55985e1e906…

MALICIOUS

PDF

76.8 KB Created: 2021-09-20 02:45:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 3e953e0783da5978e9d72fd48f4ecd9c SHA-1: 2301821ac866b48a2840683cad84e4460655bbc9 SHA-256: f4b7d55985e1e906706692f879cfce743558284cce9b515efdd714e92206ca1f
156 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. Heuristics indicate the document functions as a link farm, directing users to multiple external websites, some hosted on compromised CMS platforms. The presence of numerous unknown URLs suggests a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9840

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://boras-sjuharad.boj.se/uploads/userfiles/files/xesajejijo.pdf In PDF document text
    • https://traiteur-troyes-mariage-buffet-aube-10.blaisot-traiteur.fr/ckfinder/userfiles/files/42507571287.pdfIn PDF document text
    • http://izumrud38.com/ckfinder/userfiles/files/50820111677.pdfIn PDF document text
    • http://land89.com/ckupload/files/regigot.pdfIn PDF document text
    • http://j1ent.com/userfiles/file/20210902123757.pdfIn PDF document text
    • https://njsolarpower.com/wp-content/plugins/super-forms/uploads/php/files/0962938b1b5974113770fe257b7074f2/jotalum.pdfIn PDF document text
    • http://unseenadventure.com/userfiles/file/gepopazevilibiju.pdfIn PDF document text
    • http://thibidi.vinadesign.info/uploads/images/files/zaxibikit.pdfIn PDF document text
    • http://52fotki.ru/ckfinder/userfiles/files/11102190531.pdfIn PDF document text
    • http://doanekeyes.com/userfiles/docs/lexibikenepe.pdfIn PDF document text
    • https://www.jdconstinc.com/ckfinder/userfiles/files/58722597454.pdfIn PDF document text
    • http://baheth24cars.com/ckfinder/userfiles/files/83521962679.pdfIn PDF document text
    • http://lynxauto.ru/userfiles/file/35814192075.pdfIn PDF document text
    • http://fli.edu.mn/ckfinder/userfiles/files/faruwuxamofipabufuzeviro.pdfIn PDF document text
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/16136faacc2600---linisumetevazikatefatu.pdfIn PDF document text
    • https://heuresromantiques.com/upload/files/gawuluzebimunozet.pdfIn PDF document text
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/e5bc2d4f2f19dfc4645df4190cf3d89a/85118180794.pdfIn PDF document text
    • https://alshuka.ps/ckfinder/userfiles/files/megeloronowojib.pdfIn PDF document text
    • https://mobilpetrol.olajpark.hu/files/files/derimapofemikimi.pdfIn PDF document text
    • http://ufnk.fr/app/webroot/files/file/xikavatosakud.pdfIn PDF document text
    • https://opsclown.it/ckfinder/userfiles/files/fisotajaluviz.pdfIn PDF document text
    • http://lovec.bg/root/ckfinder/userfiles/files/rozexijewoboset.pdfIn PDF document text
    • https://mvmdigital.gr/files/files/sigonajolu.pdfIn PDF document text
    • https://abouelhoulgroup.com/userfiles/files/62837375465.pdfIn PDF document text
    • http://kingbikeonline.com/images/upload/File/gasalopufipux.pdfIn PDF document text
    • http://www.bestlifepolicy.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1613e8edb0e5cd---60475743354.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=ranjit+bawa+all+songPDF 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_off0000c85a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC85A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e071.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE071 10452 bytes
SHA-256: 4377b6908fb313b80b2145952fd21145b08bba3bcb4215a71c9cb4e096b67639
font_02_sfnt_off0000f855.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF855 17640 bytes
SHA-256: 85812a8653cd97468668bd26e7f7aa31c1677ff5c51e875878e953fdb9b15a9b

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