Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7d0006b07569716…

MALICIOUS

PDF

85.5 KB Created: 2021-06-25 15:13:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 5c9212be3075f0c5ff30af41111f0b75 SHA-1: 59c7015e815f41546e8ac9dd2668605b211e6416 SHA-256: e7d0006b0756971680d68cb21513c8a2559bb3a698d03971e1f8f8d224644df3
156 Risk Score

Malware Insights

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

The PDF was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. Several heuristics indicate the PDF functions as a link farm, pointing to compromised WordPress sites and disposable hosting, likely to distribute phishing content or further malware. No scripts were extracted, but the structure and URL patterns suggest a phishing or malware delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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 http://www.barankayalar.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1608c488ba1745---rivobatugigadozeluxizijo.pdf
    • https://davebakeragency.com/wp-content/plugins/super-forms/uploads/php/files/1fefb6a165f159f31bcc18f190398194/perobilonatiboguzigix.pdf
    • https://agilitynd.com/wp-content/plugins/super-forms/uploads/php/files/03cb1d29067e2b88f5e7342cbb0455df/nutogoxuk.pdf
    • https://alianzatours.com/imagenes/file/92360240881.pdf
    • https://ncfouting.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b932616dc95---38115627047.pdf
    • https://avenirpourtous.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160c6760b0e905---vinitawemudalenejarafake.pdf
    • http://adhdadvisory.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac4f440ea6c---49424268649.pdf
    • http://jockmurray.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d0ccb212ab---10678801937.pdf
    • https://stellabakingcompany.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bce5ad2263---61279683032.pdf
    • http://skrabl.pl/www/rpbd/fck/file/motelu.pdf
    • https://ohligschlaeger-berger.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609c8133abf5b---32828692523.pdf
    • https://www.movingwithmagna.com/wp-content/plugins/super-forms/uploads/php/files/ae1de4d0ee5df5a442852aeb2031384f/poxutaguk.pdf
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/16075ebaa69117---lirumumesirisafovavazux.pdf
    • http://dichvuhangngay.vn/uploads/image/files/13915263782.pdf
    • https://senzedigicraft.com/wp-content/plugins/super-forms/uploads/php/files/656862218be91cd1f6fe98416e8f5dac/26591200440.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=alcohol+insomnia+cure
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ec30.bin
5a94d6e2b9b7a5e804b92ea7f2cadb75e313cff94da258e59d8cb627ed7a38f2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEC30 16876 bytes
font_01_sfnt_off00011866.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11866 16792 bytes
font_02_sfnt_off0001307d.bin
09a71375a5fedec28b2d3b9e2750466230f90d33bd7e7ba94137f138fc722d5d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1307D 10476 bytes

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