Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba04bb6176595e80…

MALICIOUS

PDF

88.2 KB Created: 2021-08-10 12:56:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: fb1cba480382d6ef9beab7d263b26aea SHA-1: 433e643be2301183b872c2cb225835dc1f935102 SHA-256: ba04bb6176595e8050571b0d484dce93232716c0613526c52dfa70b51fcaca63
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.001 PowerShell

This PDF document was flagged by ML classifiers and ClamAV as malicious. It contains numerous links to external sites, many hosted on compromised WordPress installations, suggesting a phishing or malware distribution campaign. The 'Clipboard command execution lure' heuristic indicates the document instructs the user to copy and paste content into a shell, likely to execute a second-stage payload via PowerShell or cmd.exe.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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://philabc.ru/uplcv?utm_term=ubuntu+usb+installer+os+x PDF link annotation
    • https://t2sc.me/userfiles/38730566007.pdfIn PDF document text
    • http://www.anclupnapoli.it/userfiles/file/jojovimavigode.pdfIn PDF document text
    • http://xn----8sbpvg0afdbe.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/uv27fc1g7nl46v6iqr953ua4c2/6326592161.pdfIn PDF document text
    • http://www.danvillern.com/wp-content/plugins/super-forms/uploads/php/files/15d77eb95a315ba395e0deaf1405224c/woxamepeboxovajavugot.pdfIn PDF document text
    • http://ophtalmic-overnight.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160a1442c9b1bb---62389483483.pdfIn PDF document text
    • http://elm3rad.com/file/85289946080.pdfIn PDF document text
    • http://ourjamesfamilyhistory.com/clients/1/14/146a9f92d0a296c7c29e793db058bb30/File/46787299242.pdfIn PDF document text
    • https://www.kalirich.com/wp-content/plugins/super-forms/uploads/php/files/h7jitp0li30bkgnqe4brgcfsc1/67105318212.pdfIn PDF document text
    • http://marcobernini.it/userfiles/files/tefedatogofavugagulebu.pdfIn PDF document text
    • http://www.northeastmarquees.com/wp-content/plugins/super-forms/uploads/php/files/589d60ab7f42bcdc5c264fcebfae63f2/vujukimaledugu.pdfIn PDF document text
    • https://www.surajinformatics.com/wp-content/plugins/super-forms/uploads/php/files/e409733af011ab0801525bf3edad8b4e/53140023618.pdfIn PDF document text
    • http://trenermichal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160823f6c9b41e---gemodixijiziketazosu.pdfIn PDF document text
    • https://atavio.ru/files/file/nijelitokuxovulisafima.pdfIn PDF document text
    • https://sharjahcements.com/images/bulk_images/files/84876702682.pdfIn PDF document text
    • https://emmaushuis.org/pages/36326132758.pdfIn PDF document text
    • https://www.alignerco.ca/wp-content/plugins/super-forms/uploads/php/files/bf901148ba0fa29fe2678f29709895a2/wulojidaxidowubava.pdfIn PDF document text
    • https://afriqueitnews.com/wp-content/plugins/super-forms/uploads/php/files/9dc019848343b45c48468c4116742ef5/52060041502.pdfIn PDF document text
    • http://premsaktidal.in/userfiles/file/90433839603.pdfIn PDF document text
    • http://shukokai-voves.fr/userfiles/file/kegew.pdfIn PDF document text
    • http://merwepizza.com/upload/file/51345146442.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_off0000f42d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF42D 10448 bytes
SHA-256: e8a70d39e136541d59494f4058cb054db81d971eb0a8dd728ac63c8b957e639b
font_01_sfnt_off00010c0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C0C 17964 bytes
SHA-256: 1d500e32e5ae4b52ea232354bf02ed5147e12630454ef975cbe58f3120edc766
font_02_sfnt_off00013ac6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13AC6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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