Malicious PDF — malware analysis report

Static analysis result for SHA-256 819272cd7f854d3e…

MALICIOUS

PDF

73.9 KB Created: 2021-07-19 03:36:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 6f0cda444aaae496a8e786c3f532ba0a SHA-1: 73ca6def6c32ea3497631bbdb2a84de3d86704a2 SHA-256: 819272cd7f854d3e82c7b68bda5b2d50f42b754eeb67e2c4cfdc8c07f88f428a
156 Risk Score

Malware Insights

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

The PDF was flagged by ML classifiers and ClamAV as malicious. It contains a large number of embedded URLs, many of which point to compromised WordPress upload directories, indicating a link farm designed to distribute malicious content. The document body is unreadable, but the heuristics strongly suggest a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9963

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 http://www.bridalchapel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a61cc0e5e17---bawimiwa.pdf In PDF document text
    • http://rgn2u.com/userfiles/files/58467312423.pdfIn PDF document text
    • https://www.isnb.co.uk/wp-content/plugins/super-forms/uploads/php/files/0074e0c7788f41254bafd10dbda8783d/26711251970.pdfIn PDF document text
    • https://geniodelweb.com/file/bejozadisota.pdfIn PDF document text
    • https://aarhuskortet.dk/images/file/gekisazokulerot.pdfIn PDF document text
    • http://lnshiyue.com/userfiles/file/20210603005012_1739698029.pdfIn PDF document text
    • https://encoregallery.us/wp-content/plugins/super-forms/uploads/php/files/76106db458768a3f0a7c40e3dd936455/29981817451.pdfIn PDF document text
    • https://www.acptechnologies.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a70c81e86c---kixum.pdfIn PDF document text
    • https://bizdrive.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/160a1d83235b50---kofesuwoluguximakereloto.pdfIn PDF document text
    • http://www.toptehnik.si/images/48220332286.pdfIn PDF document text
    • http://lpkgoodframeupvc.com/userfiles/files/32524703480.pdfIn PDF document text
    • https://ijp2.com/contents//files/50839779445.pdfIn PDF document text
    • https://www.duffylighting.com/wp-content/plugins/super-forms/uploads/php/files/fadf1f9913bc683213042129342932c1/4313242291.pdfIn PDF document text
    • https://alphacleanwashing.com/wp-content/plugins/super-forms/uploads/php/files/9ce3447347d061f3765f37d8253191d8/jofoli.pdfIn PDF document text
    • https://hansenlight.com/UploadFile/files/xozilemazekuxa.pdfIn PDF document text
    • http://augustaelectricalwork.com/editorData/file/55920730988.pdfIn PDF document text
    • https://burmesecatclub.nz/wp-content/plugins/super-forms/uploads/php/files/ec1bae95a10201ce019f9f328ca3ff68/nasimutiluwogapijobam.pdfIn PDF document text
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/tm9p7ttrj1bsfs00uq3tg92n33/lubapagifufusabebez.pdfIn PDF document text
    • https://hagepoorter.be/files/files/rutivimojetipemig.pdfIn PDF document text
    • https://thefencedocumentary.com/adminfiles/file/56987122788.pdfIn PDF document text
    • https://dungcuruamui.com/wp-content/plugins/super-forms/uploads/php/files/5vd2qeihhtb9o4ahnehmthvo8k/5103489788.pdfIn PDF document text
    • https://vibangnhadat.com/uploads/files/33204259961.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=introductory+soil+mechanics+and+foundations+sowers+pdfPDF 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_off0000bd26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBD26 11136 bytes
SHA-256: d1f9c9d3bdf90ba9c417bcee1735257015cf0bea256ae3befc2c78f9379723bb
font_01_sfnt_off0000d708.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD708 16696 bytes
SHA-256: 4f2d2a528d7fa217fffe7edd3165e7876733a498a20a8ce456f28215f0e49839
font_02_sfnt_off000101e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101E7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.