Malicious PDF — malware analysis report

Static analysis result for SHA-256 4611901a50827786…

MALICIOUS

PDF

82.9 KB Created: 2021-09-12 01:04:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: e3f739efb3f104a72e454d01da823e1c SHA-1: bea888afaa6a0314bfce55bf84e3a50116502b4e SHA-256: 4611901a50827786a78e0f281b28344e1cc3568dd7d899ff12c7473d13b3bbdf
156 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV. It contains numerous embedded URLs, many of which point to compromised WordPress upload directories or are hosted on disposable domains, suggesting a link farm designed to distribute malicious content or lead to phishing sites. The presence of these links and the overall structure indicate an attempt to lure users to external, potentially harmful, resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://kanoonkaraj.ir/dbmanager/filebank/htmlgallery/file///xinezegasopomikujejulaz.pdf In PDF document text
    • http://dexgerm.com/data/file/userfiles/files/muvubemunegukazeke.pdfIn PDF document text
    • https://darshanam.com/ckfinder/userfiles/files/19006883035.pdfIn PDF document text
    • https://mimpidia.com/contents/files/kavatoxizefetenodajesarim.pdfIn PDF document text
    • http://ckud.handysociality.com/upload/files/kozelagoretasuzobibet.pdfIn PDF document text
    • https://repare-ton-smartphone.com/userfiles/file/13756686657.pdfIn PDF document text
    • http://www.garriagricola.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613216c3f0b5e---lolujetanasafubegodunubu.pdfIn PDF document text
    • https://burstallconrad.com/editor_files/file/91576433986.pdfIn PDF document text
    • http://avanti-kuhni.ru/upload/files/mejewemegake.pdfIn PDF document text
    • http://carrozzeriardue.it/userfiles/files/51816123210.pdfIn PDF document text
    • http://compow.net/ckfinder/userfiles/files/nugoxibe.pdfIn PDF document text
    • http://biondiairsystem.it/userfiles/files/62757537917.pdfIn PDF document text
    • https://www.savininkai.lt/ckfinder/userfiles/files/11132278938.pdfIn PDF document text
    • http://forglory.cz/ckfinder/userfiles/files/xamukef.pdfIn PDF document text
    • https://michaels-limo.com/wp-content/plugins/formcraft/file-upload/server/content/files/161353b97a4d3c---jukixu.pdfIn PDF document text
    • https://ijp2.com/contents/files/15280967167.pdfIn PDF document text
    • http://dailitara.lt/bites/uploads/file/vezozumumalexadefi.pdfIn PDF document text
    • http://sghr.ca/upload/ckfinder/files/dizirudoz.pdfIn PDF document text
    • http://colafranceschi.it/userfiles/files/41735760012.pdfIn PDF document text
    • http://daivupaint.com/img-chamthi/files/xojutapudegumixisugiz.pdfIn PDF document text
    • https://nezrenpin.com/calisma2/files/uploads/lakupuxetosijisekagovip.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612fdcf74834b---32307168179.pdfIn PDF document text
    • http://naplesredeals.com/userfiles/files/61868812926.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=inshot+pro+for+pc+free+downloadPDF 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_off0000dd24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD24 18540 bytes
SHA-256: b322f2ff7f8b80c1d6d38e21259b5dbf3c91cf79894955d9eb72abbbe2391de2
font_01_sfnt_off00010d89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D89 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000125a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125A0 10660 bytes
SHA-256: 0714b36a7a87148ab1833b8c62073ccd1b0082c7081917315eaeea25f7b6298a

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