Malicious PDF — malware analysis report

Static analysis result for SHA-256 09e00bd8955bec0d…

MALICIOUS

PDF

92.2 KB Created: 2021-05-12 01:48:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d41b5d6d3b7d6f2b2761b0efbd9a17fe SHA-1: 11b843f25eb5f4da4179ef9b66190b18966dbe4b SHA-256: 09e00bd8955bec0da8ad87b9c34d2636707b5fbc6407a5eecca20cf8582a9686
156 Risk Score

Malware Insights

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

The PDF document contains numerous links to external websites, many hosted on compromised CMS platforms, suggesting a link farm or phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, appears to be a lure related to search terms, directing users to potentially malicious URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://coretry.ru/uplcv?utm_term=motu+patlu+cartoon+kaise++kare
    • http://aaaexpressheating.com/userfiles/file/30844910197.pdf
    • https://www.sadcmedia.com/wp-content/plugins/super-forms/uploads/php/files/s4l5h4cdvdjsh4kmtkai9qi8fv/14820004151.pdf
    • https://rhdplumbing.com/wp-content/plugins/super-forms/uploads/php/files/c85dea971f693a427de4ce49a44deb60/zasinujuguviwo.pdf
    • http://www.alfainstal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16099ab374af2e---13559303384.pdf
    • https://ceadersvalet.com/wp-content/plugins/formcraft/file-upload/server/content/files/160743b9450a4f---zopidowezedonodekut.pdf
    • https://playgametoday.ru/wp-content/plugins/super-forms/uploads/php/files/6b9869860adeb4acaf13be6d385a921a/66525352850.pdf
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/c055c455e6961b86f42c3a13f1fc3726/70429283945.pdf
    • https://www.sgestrecho.es/wp-content/plugins/formcraft/file-upload/server/content/files/1607a9a1f341fa---44565728410.pdf
    • http://www.kinoimaging.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1606d0ec58b98a---54715980138.pdf
    • https://www.prestigeautobody.com.au/wp-content/plugins/super-forms/uploads/php/files/12a92554ea3d0091eb0a72f876e5fd6d/tusedu.pdf
    • https://www.andimoda.com/wp-content/plugins/super-forms/uploads/php/files/6b1dba45832c458cc24c79ba55b8ae85/73127421710.pdf
    • https://landlorddebtadvisory.com/wp-content/plugins/super-forms/uploads/php/files/1572mfmcmpv0k8ofvp7g5rvke1/64412897207.pdf
    • https://theemperorsoldclothes.co.uk/wp-content/plugins/super-forms/uploads/php/files/m9cgu06jvhbru788osschvm41v/fijitusigit.pdf
    • http://belst.by/upload/file/pitaseweporavered.pdf
    • https://amirep.com/wp-content/plugins/super-forms/uploads/php/files/3a433731e7d48547308241e20850d438/vazujanew.pdf
    • https://anzmrrn.org/wp-content/plugins/formcraft/file-upload/server/content/files/16078afabb345a---75276341630.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://fedorahosted.org/lohit
    • 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://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fc3d.bin
a63bfbde65f88d3b562d6eb5e8ae2621716fed0f320bd272b8fb82b03410f378
pdf-font-stream PDF embedded font (sfnt) at offset 0xFC3D 3292 bytes
font_01_sfnt_off00010818.bin
1df163e75993d53d599b74e876423f284f138be596b0ea7b0c3744f6f3c2c0f6
pdf-font-stream PDF embedded font (sfnt) at offset 0x10818 4996 bytes
font_02_sfnt_off00011929.bin
a2441a18a17dd64ccd8bd2d7680c363c83af8ca13a6d5f0175c83d564d0d3565
pdf-font-stream PDF embedded font (sfnt) at offset 0x11929 9792 bytes
font_03_sfnt_off00013ad8.bin
d9cee66bce1a2f6884d5bafa49fe346bd0ea0c416d989e96325815417e178d5b
pdf-font-stream PDF embedded font (sfnt) at offset 0x13AD8 16092 bytes
font_04_sfnt_off00014fdc.bin
3d89e78f2805c52d8ce680c33190172dc8e382e892885e70ac7785b5273feea5
pdf-font-stream PDF embedded font (sfnt) at offset 0x14FDC 4960 bytes