Malicious PDF — malware analysis report

Static analysis result for SHA-256 2df25dd59cd0c965…

MALICIOUS

PDF

324.7 KB Created: 2021-06-26 16:02:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: d2ab25ede5c25b05782456f28bdefea3 SHA-1: 60a85bb352f52b4b2c9f57ac6eed2eacee443d9b SHA-256: 2df25dd59cd0c9651daca33b6e4e9ef54fdb82b2b1c47b151d48db8883c429b5
206 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The presence of PDF_URI and PDF_SEO_UTM_REDIRECTOR_LINK heuristics suggests the document is designed to trick users into clicking links that lead to malicious content, likely a phishing lure or malware download. The document body is heavily obfuscated, preventing a clear understanding of its direct content, but the heuristics point towards a phishing or callback scam pretext.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

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
  • 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.
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) or Microsoft license-boilerplate documents that carry no urgency or charge/dispute escalation.
  • 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://www.ayersworthglen.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8e25c14a12---fosudejowitiwabevonigivo.pdf In PDF document text
    • http://raisemoneyonline.org/clients/6/69/691275cf9a36cab982b2498ebdc715be/File/55112259193.pdfIn PDF document text
    • http://erkerlaender.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606fc549a8b3b---28940865746.pdfIn PDF document text
    • https://edu-mate.kr/_UploadFile/Images/file/92272810190.pdfIn PDF document text
    • https://amagi.la/wp-content/plugins/formcraft/file-upload/server/content/files/1609adf3579805---38788989588.pdfIn PDF document text
    • https://cristiandellavedova.com/wp-content/plugins/super-forms/uploads/php/files/glo5hlu3k0ljequ1t1gktcm366/texuvo.pdfIn PDF document text
    • http://www.kidnuri.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d2ee05e49f---12941528719.pdfIn PDF document text
    • http://www.acefence.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070382e0aa88---20330645300.pdfIn PDF document text
    • https://www.c2commercial.com/wp-content/plugins/super-forms/uploads/php/files/12ca133cfffcb917a8fb22e1f8bace1a/nopirusujasokamuju.pdfIn PDF document text
    • http://c2mag.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a0988c57b7---45395255321.pdfIn PDF document text
    • http://xn--knstlerische-biografie-arbeit-lbd.ch/userfiles/files/wuvujemusomexazurevabevog.pdfIn PDF document text
    • https://www.spoton.pet/wp-content/plugins/super-forms/uploads/php/files/fpjl1t5f28a1h5qm6abg64pvho/mowamegigebab.pdfIn PDF document text
    • https://igruppe.no/ckfinder/userfiles//files/41893465921.pdfIn PDF document text
    • http://ivepe-elearning.gr/assets/UserFiles/mainHome/file/lidutokexanudebumifikim.pdfIn PDF document text
    • https://gbeequestriansurfaces.com/wp-content/plugins/super-forms/uploads/php/files/dq1570j8m1eitb3h08rjv4i9d7/ximerir.pdfIn PDF document text
    • https://houstoncoinshow.org/FCKeditor/file/roxudeneja.pdfIn PDF document text
    • http://peak-experience-japan.com/xiluguzudagojonilola.pdfIn PDF document text
    • http://79.170.40.182/boothtastic.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b206b290815---43519577266.pdfPDF link annotation
    • http://uyaviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080de7ca0e11---ronojuberodosuxobilavire.pdfIn PDF document text
    • http://medicapoland.pl/uploaded/file/73126477500.pdfIn PDF document text
    • https://prsnashville.com/wp-content/plugins/super-forms/uploads/php/files/f88a46b108c523888d26b9f6b7d87ee2/69538264946.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=curriculum+guide+for+driver+education+in+virginia+module+6+answersPDF 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_off0004a43e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4A43E 17192 bytes
SHA-256: 714e81d3c8d71b42a57ad17986ed936b184362c84f69904d73f3ef684b881e8e
font_01_sfnt_off0004d0ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4D0EF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0004e906.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4E906 11268 bytes
SHA-256: eeaf9fef14450e61e664d9137c4cfd121c1048f625fcfd91378f83be4354c1c4

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