Malicious PDF — malware analysis report

Static analysis result for SHA-256 e918292897c5ddd2…

MALICIOUS

PDF

71.7 KB Created: 2021-09-06 20:19:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 9b34958be0bba10d28721be2778e601c SHA-1: 98bb3bc169436f1a43fb75facaa8a0bbb194bc91 SHA-256: e918292897c5ddd2a9e477d9c110c391c4de12b10704f8075b297f4f7cc15e76
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. It functions as a link farm, containing numerous URLs pointing to PDFs hosted on compromised CMS sites, suggesting a phishing or malware distribution scheme. The presence of multiple external URIs and link farm heuristics supports this attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

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://2girlstrippin.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c8c8ec40e5---79244685876.pdf In PDF document text
    • http://guidesdugrandlarge.fr/images/import/file/56125943797.pdfIn PDF document text
    • https://windfreeklima.com/upload/ckfinder/files/87904073973.pdfIn PDF document text
    • http://c2mag.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a30efdf8e5---menikaravurefer.pdfIn PDF document text
    • https://digireg.nu/upload/resejevixitajuposidupaj.pdfIn PDF document text
    • http://www.ebsjosepirosamaria.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070480159891---41626044623.pdfIn PDF document text
    • http://aumnat2car.com/ckfinder/core/connector/php/upload/files/tipaw.pdfIn PDF document text
    • http://www.191seo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609cb92f03f3d---11073212375.pdfIn PDF document text
    • http://guojingmall.com/userfiles/file///vimowigowukewitizuda.pdfIn PDF document text
    • https://advancedcheckcashadvance.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608776f5a8bff---84639810565.pdfIn PDF document text
    • https://n95america.com/wp-content/plugins/super-forms/uploads/php/files/827a772baa25469927226d4216f80cc5/zabipuroxi.pdfIn PDF document text
    • https://mumegram.com/userfiles/file/pipopativowudogigepetek.pdfIn PDF document text
    • http://12shio5.com/contents/files/dajisasivajenojodigoxinov.pdfIn PDF document text
    • http://energywork.pl/userfiles/file/zovodenudo.pdfIn PDF document text
    • https://www.cr-sdc.org/wp-content/plugins/super-forms/uploads/php/files/d4d2b2ce1fd51f29defe91273c3707cc/tisusogajanubuwomawule.pdfIn PDF document text
    • http://mail.me.ntou.edu.tw/ckfinder/userfiles/files/20210824_120711.pdfIn PDF document text
    • https://die-elke.de/cms/elke_page_files/file/jegunugowukotanijusilina.pdfIn PDF document text
    • http://porpora.info/imagenes/imagenes_contenidos///wuvodekew.pdfIn PDF document text
    • http://metallpress.ru/files/jebawekerav.pdfIn PDF document text
    • http://toshiteriyakiburien.com/uploads/files/tuboro.pdfIn PDF document text
    • https://bizdrive.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/16075431c46e0c---42148280137.pdfIn PDF document text
    • https://ecoinkworld.com/wp-content/plugins/super-forms/uploads/php/files/ac5894c022f5ec440b87a38a0f52edd0/tizukufebunigopinewaw.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=lp+meningitis+tb+pada+anak+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_off0000b876.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB876 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d08d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD08D 10764 bytes
SHA-256: b548513a79781c99556283453a6c2c6802600cc5472f0ffdf10403ce0df8abed
font_02_sfnt_off0000e8e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8E5 15984 bytes
SHA-256: 342ff0bc632f967d4ce26cac1a1db5e2dd343a5435f12fbc5cfd9a478cddf7e3

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