Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e39981e637be6d0…

MALICIOUS

PDF

83.7 KB Created: 2021-09-09 08:54:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: c62d19c54e6ba04086ee6a0f4e21fb6b SHA-1: 7040b888bd981c7866fe2f8e6f9198e4b98a5c10 SHA-256: 7e39981e637be6d06f9fd98e934e4724bcff970344f0379f82b0fbb918150fda
224 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing and potential trojan threat. The document employs social engineering tactics, including impersonating cloud services and using download buttons, to trick users into clicking links. Notably, it instructs users to press Win+R or paste a command into a terminal, suggesting an attempt to bypass macro restrictions and directly execute a payload. The numerous embedded URLs point to various disposable hosting sites and compromised CMS uploads, likely serving as download locations for further stages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 9

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • ClickFix social engineering attack high SE_CLICKFIX
    Document instructs the user to press Win+R or paste a command into a terminal — consistent with ClickFix attacks that bypass macro restrictions by tricking users into running malicious commands directly
  • 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.
  • Cloud document impersonation lure medium SE_CLOUD_DOC_LURE
    Document impersonates a cloud file-sharing service such as SharePoint, OneDrive, Google Drive, Dropbox, Box, or Microsoft 365 and asks the user to open, verify, or access a shared document
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://irlanc.ru/uplcv?utm_term=accidentally+deleted+downloads+folder+android PDF link annotation
    • https://nabijdefossa.nl/upload/files/tuzarejulazuj.pdfIn PDF document text
    • https://promptcorporate.com/ckeditor/ckfinder/userfiles/files/mepawobefexosasobezar.pdfIn PDF document text
    • http://elsped.hu/files/file/26703326016.pdfIn PDF document text
    • https://dgssu.com/upfolder/e/files/20210908205303.pdfIn PDF document text
    • http://form4concrete.ru/pics/cont/file/funumude.pdfIn PDF document text
    • http://lasfyy.com/uploadfile/file/20210903085114190.pdfIn PDF document text
    • http://sllight.ru/design/img/upload/file/gozojudabijiwoju.pdfIn PDF document text
    • http://maraulsan.com/ckfinder/userfiles/files/38310358645.pdfIn PDF document text
    • http://salukool.ee/upload/userfiles/file/54978391944.pdfIn PDF document text
    • https://prana.video/wp-content/plugins/super-forms/uploads/php/files/c4rftf9lfaal46jecm11qj1as6/68451947093.pdfIn PDF document text
    • https://asmitahrgroup.com/ckfinder/userfiles/files/lemovonozasojim.pdfIn PDF document text
    • https://sapsda.com/SapmaUserfiles/file/20280181139.pdfIn PDF document text
    • http://biznesfishki.ru/files/userfiles/files/sikiridobibazeso.pdfIn PDF document text
    • http://xn--82cac8d3ajrc0gd0bo4a7nf3qg.com/userfiles/files/29729246775.pdfIn PDF document text
    • http://argra.rs/wp-content/plugins/formcraft/file-upload/server/content/files/161331bb837ccb---4287182628.pdfIn PDF document text
    • https://feldmann-spedition.de/pics/userfiles/file/silimu.pdfIn PDF document text
    • http://maxgear.cz/webpagebuilder/ckfinder/userfiles/files/38622974681.pdfIn PDF document text
    • http://hykylalumni.org/userfiles/vubonagozasi.pdfIn PDF document text
    • http://www.naturapreserved.com/wp-content/plugins/formcraft/file-upload/server/content/files/16134a4931ff68---bopoladabevusaf.pdfIn PDF document text
    • http://pferdefreunde-brueckenhof.de/sites/default/files/userfiles/file/45254560335.pdfIn PDF document text
    • https://nolimitscenter.be/peausitive/images/FCKeditor/file/75463381658.pdfIn PDF document text
    • http://dautuck.com/uploads/userfiles/file/tasaxanabor.pdfIn PDF document text
    • http://bordahusfeldolgozo.hu/editor_up/kujatibapegatujopozelul.pdfIn PDF document text
    • https://kabelkyaobuv.sk/editor_uploads/files/wevokobosidadovulerebezu.pdfIn PDF document text
    • https://bc2000.order-pro.com/ckfinder/userfiles/files/jusavoporerilaw.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_off0000e0c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0C8 10648 bytes
SHA-256: c10637b247c0e54faaad2e1e89745cad8cf055bfdcf9dffa72e10933cd19be67
font_01_sfnt_off0000f966.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF966 18380 bytes
SHA-256: 846755b014700bce5e2bc718074fcc9aba6d2865b0ff2ded7fc25f4a59c579ab
font_02_sfnt_off000128fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128FE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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