Malicious PDF — malware analysis report

Static analysis result for SHA-256 c7774b52bb6233f0…

MALICIOUS

PDF

93.3 KB Created: 2021-09-09 00:48:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: fa956533a3efe90ec8416294f9bbfe1e SHA-1: a926b2b707944351ab7542fab4103f8d150483fd SHA-256: c7774b52bb6233f035966f3ca53f96286d633437a70ecebcb6ace02010a81fdb
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous links to external websites, many of which are hosted on compromised or disposable domains, suggesting it functions as a link farm. The presence of 'utm_term' parameters in some URLs indicates an attempt to track user engagement, often associated with phishing or malware distribution campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9822

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 https://medvor.ru/uplcv?utm_term=minecraft+pe+lucky+block+mod+free+download PDF link annotation
    • http://farmaciafoglia.eu/userfiles/files/47700211253.pdfIn PDF document text
    • http://hsaltsj.com/uploads/files/29301164657.pdfIn PDF document text
    • http://fw-simple.com/uploads/files/40676445440.pdfIn PDF document text
    • http://daonshop.com/files/fckeditor/file/57993008695.pdfIn PDF document text
    • http://smartcookieacademy.com/wp-content/plugins/formcraft/file-upload/server/content/files/161369b4c95683---15685687121.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/161392930a4ad4---99974494153.pdfIn PDF document text
    • http://lesmashclub.com/imgUpload/files/61591476564.pdfIn PDF document text
    • http://fourfoods.com/images/files/73904096000.pdfIn PDF document text
    • http://geoplan.su/userfiles/file/22493602556.pdfIn PDF document text
    • https://777mto.org/contents/files/gujanasixuterujemupa.pdfIn PDF document text
    • https://iuoshili.com/upload/users/files/tiladilopizolo.pdfIn PDF document text
    • https://alismobile.co.uk/wp-content/plugins/super-forms/uploads/php/files/eba197fbf681249600e13eb3ac5d6106/buzuk.pdfIn PDF document text
    • http://praguynakorn.com/praguynakorn/picture/datapro/files/74242112794.pdfIn PDF document text
    • http://cu-hinothai.com/ckfinder/userfiles/files/25272972875.pdfIn PDF document text
    • http://briztravel.com/upload/files/36818635021.pdfIn PDF document text
    • http://www.investinwielkopolska.pl/application/lib/ckfinder/userfiles/files/xizupuwiwisebet.pdfIn PDF document text
    • http://domki-kopalino.pl/pliki/49612286382.pdfIn PDF document text
    • http://shiny-baby.com/fileimage/file/12180734478.pdfIn PDF document text
    • http://kesifveotesi.com/files/sereperav.pdfIn PDF document text
    • https://girl0229960192.com/upload/users/files/temewudobamumoribe.pdfIn PDF document text
    • http://madveras.com/ckfinder/userfiles/files/vosalelowutederuxexuvuba.pdfIn PDF document text
    • https://rosenstein.lu/userfiles/files/45132895095.pdfIn PDF document text
    • http://mastrodibaglio.it/userfiles/files/76071831444.pdfIn PDF document text
    • https://www.ikedatosou.com/wp-content/plugins/formcraft/file-upload/server/content/files/16135c87684b95---xalatolazux.pdfIn PDF document text
    • http://hillsdalehorseboarding.com/ckfinder/userfiles/files/27541717045.pdfIn PDF document text
    • https://rendszergazda-cegeknek.hu/ckfinder/userfiles/files/55842327539.pdfIn PDF document text
    • http://makesrealsense.com/ckfinder/userfiles/files/73776912222.pdfIn PDF document text
    • https://fancybox.pamlskovnik.cz/ckfinder/userfiles/files/gifejulogojopumaver.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_off00010030.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10030 20132 bytes
SHA-256: 222bd133921e2cd4198f18f7b09fd4fa15cdd7ec57234a5af03ccc98b0809548
font_01_sfnt_off00013537.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13537 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00014d4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14D4E 11136 bytes
SHA-256: e350db17370c771cff3de25065df0b87b5aa59c7da6ac924af211f366386d8bc

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