Malicious PDF — malware analysis report

Static analysis result for SHA-256 69ec9376c1a45d12…

MALICIOUS

PDF

81.8 KB Created: 2021-08-31 17:56:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: e3ddbc9d889f0b9943b2697d761690cb SHA-1: ffa76aa2c945b69d41fcd8a5f332cf0b2f36c2a0 SHA-256: 69ec9376c1a45d124c34389d950d6f729dff1be18872eb992f302cdf393077ba
204 Risk Score

Malware Insights

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

The PDF contains multiple links to potentially compromised websites and a heuristic firing indicates a 'clipboard command execution lure', suggesting the document instructs the user to copy and paste commands into a shell. This is a common technique for downloading and executing secondary payloads. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://archism.ru/uplcv?utm_term=linux+mint+bootable+usb+download PDF link annotation
    • https://dm288.com/slicice/file/32907975643.pdfIn PDF document text
    • http://indyztyle.com/ckfinder/userfiles/files/merulizibep.pdfIn PDF document text
    • https://bodwellassociates.com/wp-content/plugins/super-forms/uploads/php/files/fbcf0ec6b1bd40ee2185503b69f9428d/lasamajaxamixupenazix.pdfIn PDF document text
    • http://anandtouristcorporation.com/uploads/99558082446.pdfIn PDF document text
    • https://loan-financial.com/wp-content/plugins/super-forms/uploads/php/files/c9daa68f861e083d42779f43faaddf96/werawuruvonenemavu.pdfIn PDF document text
    • http://stavclearing.ru/upload/files/3040783574.pdfIn PDF document text
    • https://www.bouwenaaneensterkwerkgeversmerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607d07317731c---95594140809.pdfIn PDF document text
    • http://klusjesindex.nl/images/uploads/89063163028.pdfIn PDF document text
    • http://opersan.com/file/54532351413.pdfIn PDF document text
    • https://teamcode.net/upload/files/97212461259.pdfIn PDF document text
    • https://sintasyapi.com/img/userfiles/file/60826070854.pdfIn PDF document text
    • https://nestaerospace.com/uploads/file/vegavoxusotilefoduxane.pdfIn PDF document text
    • http://xn----8sbpvg0afdbe.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/670huee07bsi9r7e1e1ms2r4d1/25833953747.pdfIn PDF document text
    • https://www.sevgiliyevideo.net/wp-content/plugins/formcraft/file-upload/server/content/files/160892056e3e26---14628199224.pdfIn PDF document text
    • http://akinmedical.com/uploads/file/95798543754.pdfIn PDF document text
    • http://airconbank.com/upload/fckeditor/file/zepuwibekidurisopuke.pdfIn PDF document text
    • http://www.bewegeninarnhem.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608c647928b25---woxesobomu.pdfIn PDF document text
    • http://parvazyab.net/basefile/api203/files/zufejukewumim.pdfIn PDF document text
    • http://bearings-home.com/userfiles/file/94617394671.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_off0000d886.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD886 18636 bytes
SHA-256: 555d1833a1974e05dd77cd0e13e0c62101ddb0ced635899a896bd135c6cdc517
font_01_sfnt_off000108ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108CA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000120e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120E1 10692 bytes
SHA-256: a847f32cf681b6d4847204e969372c49d064a038b9666d7ffcc6ac2b7e641807

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