Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa7e26f5821e4e6d…

MALICIOUS

PDF

86.3 KB Created: 2021-07-02 20:33:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: a327edc260315188cb8871f9a4a2a8b9 SHA-1: 053509487827ef3ad18891655d8e1f894f773f49 SHA-256: fa7e26f5821e4e6dd1b87f46c5b1e629fbffae881667d213f99a492ece7cdbc3
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV. It contains numerous links pointing to compromised websites, likely intended to redirect the user to malicious content or phishing pages. The presence of multiple distinct hosts and link farms suggests an attempt to distribute malicious content across various compromised platforms.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://jaunimodienos.lt/wp-content/plugins/super-forms/uploads/php/files/fpjoc5f15n1vh7d54cp6t4tqkf/gatujarexijotogit.pdf
    • https://levin-dent.ru/wp-content/plugins/super-forms/uploads/php/files/9f1fdcd65577828d268df1a1218374e0/76533405791.pdf
    • https://assurancemauricie.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b4017609991---midulusemorukidarav.pdf
    • https://munord.com/wp-content/plugins/super-forms/uploads/php/files/24b86fcf22e4f9e24c25ccc4ba7fa69d/pelifujalewifekepeg.pdf
    • http://www.siscard.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7635d08e42---8103646426.pdf
    • https://nolimitscenter.be/peausitive/images/FCKeditor/file/85515159004.pdf
    • http://lawcab.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1607faee91b352---72707127537.pdf
    • http://birzebbugastpetersfc.com/files/file/fekosabejig.pdf
    • https://www.nestroots.com/wp-content/plugins/super-forms/uploads/php/files/u995hs4c3jrr8h16hg93igldo4/sivuwonixigitewizakipelu.pdf
    • http://baraanduliaptti.org/userfiles/file/wuludawajokugedera.pdf
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/160987417220c1---tifosuremo.pdf
    • http://mas.vacations/wp-content/plugins/formcraft/file-upload/server/content/files/160ac8f7ed3de2---lilomixivupuvesakupe.pdf
    • http://seventyfirstclassof69.com/clients/60772/File/13121560209.pdf
    • http://webcertain.net/contentupload/fckeditorUploads/organization_/file/53581960967.pdf
    • http://maekalocal.com/Maeka/UserFiles/File/51788569873.pdf
    • http://abwva.com/uploads/files/61900504443.pdf
    • https://njsolarpower.com/wp-content/plugins/super-forms/uploads/php/files/92e08775a627d27926c34d7c38630023/82162789904.pdf
    • https://dedywiredja.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085c343a18d9---65084553501.pdf
    • http://www.gcsystem.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160c3a869b9a06---61776142990.pdf
    • http://securitydirect.it/wp-content/plugins/super-forms/uploads/php/files/202334d5111ea48db7c766d0cced4a37/jawomezejoji.pdf
    • http://lifemartrealestateconnect.com/wp-content/plugins/super-forms/uploads/php/files/g7aivlqttg3ogcldjcg6b1g2c7/95230485597.pdf
    • http://www.gradur.ba/wp-content/plugins/formcraft/file-upload/server/content/files/160a0cdf68ad2d---42641433294.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=line+of+duty+new+series
    • 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_off0000ef58.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xEF58 16792 bytes
font_01_sfnt_off0001076a.bin
8413a0fc30550c4b9d2fb9bdff47183a5d3d0abeb8230ccbb45ac03fa0beff3b
pdf-font-stream PDF embedded font (sfnt) at offset 0x1076A 17280 bytes
font_02_sfnt_off0001349c.bin
9ce0ec06096b3353c3602c3a84962a78676a82b2c82268f6293b1b8de9bc3130
pdf-font-stream PDF embedded font (sfnt) at offset 0x1349C 10396 bytes