Malicious PDF — malware analysis report

Static analysis result for SHA-256 003d6b3a126ef463…

MALICIOUS

PDF

235.5 KB Created: 2021-07-23 02:57:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 507dfd325191f917a95aa28ec81022fb SHA-1: c0c7c5dd4e379deb76db6123080ad45ac31c05f3 SHA-256: 003d6b3a126ef463ccf7a0de0e4f06323e8c957277610192a495208fab09c205
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links pointing to compromised WordPress uploads and SEO redirectors, indicating a phishing or malware distribution attempt. The ClamAV detection and ML classifier strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious document designed to lure users into downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9793

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
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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.
  • 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://primax.fr/wp-content/plugins/super-forms/uploads/php/files/invim4qbkrkdl7qma5tf3u5gi6/dijojowuzitupugag.pdf In PDF document text
    • https://esteticarcare.com/wp-content/plugins/super-forms/uploads/php/files/36799bede01f260ccd84961d72f3f205/21542799565.pdfIn PDF document text
    • https://www.baileysmilk.com/wp-content/plugins/super-forms/uploads/php/files/0095e88a246081d2f660adf312a2b1dc/89931978921.pdfIn PDF document text
    • http://dynamic1984.com/user_file/file/wajomunimiwanibadomi.pdfIn PDF document text
    • http://mas.vacations/wp-content/plugins/formcraft/file-upload/server/content/files/16086c49781e0e---weboxo.pdfIn PDF document text
    • http://ukuleleceilidh.ca/clients/860383/File/94631252724.pdfIn PDF document text
    • https://deconkhoemanh.com/wp-content/plugins/super-forms/uploads/php/files/42u5q6rb0072tiveqqnq6mp09u/rixafajusaki.pdfIn PDF document text
    • https://www.sgestrecho.es/wp-content/plugins/formcraft/file-upload/server/content/files/160cd669ad2e4b---bogoxufeliluxirofefon.pdfIn PDF document text
    • https://www.lang-mayer.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608ca4b4e59d9---6041931468.pdfIn PDF document text
    • https://givemeit.ru/wp-content/plugins/super-forms/uploads/php/files/76a35057bcfdccafba7bfb8eaf1de94b/vubibebuberax.pdfIn PDF document text
    • https://www.budgetskemaet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160762a66b1e75---17638665269.pdfIn PDF document text
    • http://worldofpacifiers.com/editor_uploads/system/files/75249472706.pdfIn PDF document text
    • https://asi-filter.pl/files/file/damipimel.pdfIn PDF document text
    • http://yaqeen-eg.com/userfiles/file/jepowojazipegevaloneg.pdfIn PDF document text
    • https://afayl.com/userfiles/file/fupejitoziva.pdfIn PDF document text
    • https://southafricapools.com/contents//files/91467883280.pdfIn PDF document text
    • http://qianlong99.org/ckfinder/userfiles/files/6227317632.pdfIn PDF document text
    • https://www.landalastadservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090738af3de4---vuxavew.pdfIn PDF document text
    • https://contabil-fiscal.ro/mm/file/72847647938.pdfIn PDF document text
    • https://www.euroservicemilano.it/wp-content/plugins/formcraft/file-upload/server/content/files/1608b32be922c3---3138056718.pdfIn PDF document text
    • http://unipsyclinic.com/userfiles/file/20210517060343.pdfIn PDF document text
    • http://pocatellocampfire.com/wp-content/plugins/super-forms/uploads/php/files/pn8g6ggbf6t2pr2knqjjp2gc2k/diwitatuwojijofegu.pdfIn PDF document text
    • http://svenstavik.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c897ae4b965---wiromowe.pdfIn PDF document text
    • http://ytbozhuo.com/upload/file/102128239978.pdfIn PDF document text
    • https://sckprime.com/wp-content/plugins/super-forms/uploads/php/files/ab1ebcafc0b52902b8bf7aaff0a1a154/24973402556.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=the+last+of+us+main+theme+guitarPDF 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_off00033d7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x33D7E 18192 bytes
SHA-256: 603df0985194a43b25f1638626a2dce1104ec3f5e31d26fe188e5632cd601c2c
font_01_sfnt_off00036c5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x36C5E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00038475.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x38475 10724 bytes
SHA-256: 398f3a7606b67931e2c0b15748fcf4ba4099fef14b649d397f30e4103a4b94ff