Malicious PDF — malware analysis report

Static analysis result for SHA-256 60c969029a7d107b…

MALICIOUS

PDF

84.7 KB Created: 2021-08-15 03:42:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 1bc51f2c508a51dfe0a4eb0719450595 SHA-1: 92b5f5b5684555c249b56808b8ec7c7e6929e558 SHA-256: 60c969029a7d107b713998488d1ac83d910b434d1a93e5bb3de9f1cf5e2b260e
156 Risk Score

Malware Insights

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

This PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It functions as a link farm, containing numerous URLs that point to external resources. Several of these URLs are hosted on compromised WordPress sites, indicating a potential distribution or hosting strategy for malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

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://securitydm.rs/slicice/file/ledutixunosuxug.pdf In PDF document text
    • http://italiangreyhound.pl/img1/userfiles/file/77950627788.pdfIn PDF document text
    • https://vinadesigndanang.vn/uploads/image/files/visuzugomu.pdfIn PDF document text
    • http://automotiveenergy.cz/userfiles/file/suwezugobevaxa.pdfIn PDF document text
    • http://tc-muehlacker.de/data/tcmuehlacker/userfiles/file/tevisozi.pdfIn PDF document text
    • https://susta.vn/userfiles/file/51432071197.pdfIn PDF document text
    • http://csc0516.com/userfiles/file/20210814134132_693gsn.pdfIn PDF document text
    • http://skrabl.pl/www/rpbd/fck/file/81739977722.pdfIn PDF document text
    • https://rumahbaruku.com/contents//files/28414336873.pdfIn PDF document text
    • http://andreagarciam.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a41703329a7---48492420491.pdfIn PDF document text
    • http://cgt-fo-csc.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160abae2dcdbcc---komepufumudalifovoxun.pdfIn PDF document text
    • http://www.risingstars.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16084765289f99---zazumofexotesirodat.pdfIn PDF document text
    • https://vizzzio.ru/wp-content/plugins/super-forms/uploads/php/files/c8443682396bce61fb807aec2be2bdf3/bakadojivoseturugomuxi.pdfIn PDF document text
    • http://stkvn.ru/wp-content/plugins/super-forms/uploads/php/files/53019231684fc47c91b4c65be8eef83e/kativubatujoderakelaga.pdfIn PDF document text
    • https://www.hospedeagora.com.br/wp-content/plugins/super-forms/uploads/php/files/hkhehq625akh7efph2m3lpg1u4/58646886782.pdfIn PDF document text
    • http://alexforstarlight.com/clients/4/41/4125d763bdae894b2c088b8c4c0f4705/File/7224987362.pdfIn PDF document text
    • https://sportli.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/1607cf3218aa44---15945679571.pdfIn PDF document text
    • http://penoplex24.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160ac9b4085847---7216162579.pdfIn PDF document text
    • http://iltorg.ru/upload/file/34168093102.pdfIn PDF document text
    • http://colorfusion.us/admin/images/file/nogaperegetamegatinin.pdfIn PDF document text
    • http://ipvoicenj.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d205e0cc7b7---lirekisetigiz.pdfIn PDF document text
    • http://windcampus.com/wp-content/plugins/formcraft/file-upload/server/content/files/160929501f06a7---32559695264.pdfIn PDF document text
    • https://socialchangefactory.org/wp-content/plugins/super-forms/uploads/php/files/550f6cdf5a3978e1f53fb28dd1835126/bugoxinutulafunekadofes.pdfIn PDF document text
    • http://www.theflightfest.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d4c7523c37c---luwuzotapatokuwo.pdfIn PDF document text
    • https://ecoinkworld.com/wp-content/plugins/super-forms/uploads/php/files/761bb28b6c6a88568c39fb0d695d25ea/34201778044.pdfIn PDF document text
    • https://conexkarvan.com/cache/fck_files/file/57894999839.pdfIn PDF document text
    • http://agisma.ru/files/pages/files/suxozesola.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=why+is+my+bosch+washing+machine+leaking+underneathPDF 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_off0000e692.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE692 11344 bytes
SHA-256: 9c4801117716090a5c3e6baaa60cd7c54ed4d304b2ad2764747d98b598f43d5c
font_01_sfnt_off000100f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100F3 16556 bytes
SHA-256: 69fedc30472e92ab31d890758744b7cb3a139c09ecf06cf394eaa2c12b8bdfb7
font_02_sfnt_off00012bb9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12BB9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1