Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d919474ba30eb96…

MALICIOUS

PDF

100.0 KB Created: 2021-06-27 08:36:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 5d735e38538666d88599e0b7f6ed708f SHA-1: b7fc06de099588ccf728f5a2d67265d81716a1aa SHA-256: 2d919474ba30eb962a9494a499e8393ae96b7c421c2595077d3d349baf2ea513
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links, many pointing to compromised CMS uploads and disposable hosting, suggesting a link farm designed to lure users to external sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious document, potentially leveraging embedded JavaScript for redirection or exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9681

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 https://garglob.ru/uplcv?utm_term=best+quality+screen+recorder+for+android
    • http://kursadowicz.pl/Upload/file/39458366048.pdf
    • http://scissortailfarms.com/wp-content/plugins/formcraft/file-upload/server/content/files/160949df632f25---88255775044.pdf
    • https://www.tangelo.no/wp-content/plugins/formcraft/file-upload/server/content/files/1607a3a8c48924---gerilalevumuvizadewaruto.pdf
    • https://playgametoday.ru/wp-content/plugins/super-forms/uploads/php/files/ad8007b9dc208b1b9e71d4ce2cd982fb/gasemulopodekod.pdf
    • https://broadstripe.com/wp-content/plugins/super-forms/uploads/php/files/35081b10cf00b33e1f3fd08af9a53cd9/51609028945.pdf
    • https://www.avenueroadadvertising.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080773203c41---meronopowipinogi.pdf
    • https://arizonalightingsales.com/wp-content/plugins/super-forms/uploads/php/files/110ea18c7c40741e2dc4d1deb55a50fb/54591386832.pdf
    • https://salvamontbihor.ro/app/webroot/files/userfiles/files/33732097231.pdf
    • https://adiwirawanbali.com/wp-content/plugins/super-forms/uploads/php/files/86552288e23f53126901f24306489834/29193228864.pdf
    • https://alianzatours.com/imagenes/file/vepedufukanidabe.pdf
    • http://www.ecostroyservis.ru/File/13565794008.pdf
    • https://holocaustresearch.pl/nowy/photo/file/tevuxidowuwa.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e263a299d7---nugomomitubolabeb.pdf
    • https://jennysbooks.com/wp-content/plugins/super-forms/uploads/php/files/7333e0305b6b0d7d03f29f05e37ee5e7/47206927844.pdf
    • https://nscs.org/wp-content/plugins/super-forms/uploads/php/files/f652feb0af93ddb54a1e8f8e08199fb0/53732292842.pdf
    • https://binarbaidfabrication.com/public_html/userfiles/file/xosasulufudunizogatadelag.pdf
    • http://all-pass.com/folder/editor/file/musidanepavir.pdf
    • http://ljhalls.com/wp-content/plugins/super-forms/uploads/php/files/a354d658a079bd58ea66a60c7954f1b5/43193643222.pdf
    • https://regalcabs.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160927bb60d6e2---69216967113.pdf
    • http://www.meglobalinc.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1609bd5094ac29---41823695506.pdf
    • https://rhdplumbing.com/wp-content/plugins/super-forms/uploads/php/files/c085896f4422c848599dec30a5afa612/nutigijib.pdf
    • https://teenvolunteerdallas.org/wp-content/plugins/super-forms/uploads/php/files/a9bec24fb9c4d0039e9e2492c4462184/bejudatijaxaduxaze.pdf
    • https://estoniapools.com/contents//files/16977091923.pdf
    • http://robinsonfamilyreunion2021.com/clients/7/77/7769cd5c98d63cfb9738ae2db1c5c42c/File/99411924471.pdf
    • https://terravistahometeam.com/wp-content/plugins/super-forms/uploads/php/files/bdb9a4eddc10d362dfd05b9cc68d48a2/vuwukixozufemowe.pdf
    • http://mouaumfb.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac65baefe31---gotiwinavuw.pdf
    • http://foto-klub.dk/userfiles/file/xaraw.pdf
    • http://ziepniekkalns.lv/wp-content/plugins/formcraft/file-upload/server/content/files/16087f33e7dbe2---gupinowewadedavexowase.pdf
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010c29.bin
edf94879d96d940332c66bb9d1735ee52acd3a0cab7c41ec03ffbdf5723c0bda		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10C29 17824 bytes
font_01_sfnt_off00013b28.bin
4effa6f558c4377914a4b7f3b8eb2517c423b461ef32668f3b62110f672e914c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13B28 10884 bytes
font_02_sfnt_off0001544a.bin
97e3f73a58ccdd4784c9ae1678d9f90717e6b6d0c87c36bf93adb8865ef65ebd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1544A 16192 bytes
font_03_sfnt_off000169d6.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x169D6 16792 bytes

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