Malicious PDF — malware analysis report

Static analysis result for SHA-256 98f02fe223000ec9…

MALICIOUS

PDF

78.6 KB Created: 2021-09-01 23:52:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 610bd7b09606be40267132863a639fb7 SHA-1: 0c53b453912c3c3472e9bdc73b9fc25259353813 SHA-256: 98f02fe223000ec95951714b79f32195a89828dbe60294d580f539b9d051017a
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for Pdf.Phishing.Trojan. The file contains numerous embedded URLs pointing to compromised websites and disposable hosting, suggesting it functions as a link farm. The primary purpose appears to be directing users to malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

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://smidgel.ru/uplcv?utm_term=how+to+insert+a+word+in+excel+cell PDF link annotation
    • http://glina-master.ru/admin/ckfinder/userfiles/files/nafowigonenamet.pdfIn PDF document text
    • http://orourkelawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/78455379035.pdfIn PDF document text
    • https://autoandtruckrepair.net/nbloom/fckuploads/file/65866249391.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ec4a879a870---gupejemosawimafa.pdfIn PDF document text
    • https://www.movingwithmagna.com/wp-content/plugins/super-forms/uploads/php/files/287b5a67788456fad07270d399db454d/xesazup.pdfIn PDF document text
    • http://www.opencalgary.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609c0655868e7---33847038319.pdfIn PDF document text
    • https://floorco.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/5890016ccfdfbeaf2bdda79a61388d44/kejuvafanatetazigopa.pdfIn PDF document text
    • http://aedelsur.com/contenido/files/nupipenibedesukok.pdfIn PDF document text
    • https://prolocolidodisavio.org/ckfinder/userfiles/files/88447147056.pdfIn PDF document text
    • https://www.grandeprairie.org/wp-content/plugins/formcraft/file-upload/server/content/files/160995778ee7fc---zitividipalorixig.pdfIn PDF document text
    • http://okfilm.kr/userData/board/file/6149744976.pdfIn PDF document text
    • https://regenerativetherapyforpain.com/wp-content/plugins/super-forms/uploads/php/files/54c1f0466bb65c6186ac3ff097b9ab80/13215483805.pdfIn PDF document text
    • http://csptech.net/admin/userfiles/file/53000932483.pdfIn PDF document text
    • http://baugeraeteverleih.de/benutzerdateien/zuputesesumoriwemef.pdfIn PDF document text
    • https://thieumaunao.vn/workspace/develop/uploads/ck_upload/files/dumipelajozaruzemapitis.pdfIn PDF document text
    • https://stellabakingcompany.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bfb0387519e---42654000825.pdfIn PDF document text
    • http://envigest.cz/upload/file/moridoserezedasoni.pdfIn PDF document text
    • http://ulv-fogger.es/d/files/24538383828.pdfIn PDF document text
    • https://beautifullifeuk.com/wp-content/plugins/super-forms/uploads/php/files/a0ada4d518e7c4761293bbc31048eb03/zezeji.pdfIn PDF document text
    • http://irmascaritasdejesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/1612926cfe4afe---letaluvanetifofo.pdfIn PDF document text
    • http://bulk-supplies.com/userfiles/file/11208966845.pdfIn PDF document text
    • http://clingac.es/d/files/20145710435.pdfIn PDF document text
    • http://ave-france.com/pics/files/35250934597.pdfIn PDF document text
    • http://immobilieninvestors.de/userfiles/file/tuwowusibigegamupaxeber.pdfIn PDF document text
    • http://mirrorgallery.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e965eb12e6---25734902500.pdfIn PDF document text
    • 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_off0000d113.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD113 16700 bytes
SHA-256: f99e24e06dc36e19b3e442d61cfbb8d3ad9225ef70342ad5fe55ca9e3db9bd76
font_01_sfnt_off0000fc18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC18 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001142f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1142F 10544 bytes
SHA-256: 5d9b2b5bd3e61ec54579991423109f59913758c3d749ac34c5d8a093acd4b817

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