Malicious PDF — malware analysis report

Static analysis result for SHA-256 31d0215f2fbce148…

MALICIOUS

PDF

85.1 KB Created: 2021-07-19 16:12:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 05e0b1e63a7f3b43827302f9d7fe4812 SHA-1: 76234fd400a72e3f7f6c22f5003945764cfae6a8 SHA-256: 31d0215f2fbce14803090a7042be4d6357bc05a864abbbe703fe22a179831342
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of external links, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

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://someteme.com/archivos/_20210715091013.pdf In PDF document text
    • https://drivingschoolofnorthtexas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160811874579bb---69865108426.pdfIn PDF document text
    • http://henanshuangxin.com/d/files/bojigegobepunukiru.pdfIn PDF document text
    • https://argumentua.com/i/file/50985507203.pdfIn PDF document text
    • http://tmacfashion.com/ckfinder/userfiles/files/befixapu.pdfIn PDF document text
    • http://yachtandgulet.com/userfiles/file/51751825573.pdfIn PDF document text
    • https://www.geosuiteonline.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608c49c5e0dcb---fununowo.pdfIn PDF document text
    • https://thepetrichortouch.com/wp-content/plugins/super-forms/uploads/php/files/u46l0drkdrclj58b51d77tsp7d/nagegewetabulanusetuxumiz.pdfIn PDF document text
    • http://szalkasszorutacskok.hu/app/webroot/files/content/files/lazinulajebozewiwatebixa.pdfIn PDF document text
    • http://www.ibadirect.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087b5b0cfb62---87346713125.pdfIn PDF document text
    • https://www.traveltimevipp.com/wp-content/plugins/super-forms/uploads/php/files/c66d667e3026831064505d581a72336a/29557150589.pdfIn PDF document text
    • http://www.alfainstal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160b366bc83bab---61235792611.pdfIn PDF document text
    • https://sckstone.com/wp-content/plugins/super-forms/uploads/php/files/fde58322d9ceaa910c68f7ad57c5d6de/7007742612.pdfIn PDF document text
    • https://humantouchtranslations.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/160aa35f07b085---53443866320.pdfIn PDF document text
    • https://messianic.live/wp-content/plugins/super-forms/uploads/php/files/37aee46f5ca4ddace247aa6fb4e827ed/zipibenazenojav.pdfIn PDF document text
    • http://structurecreative.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b2c257e101a---pozux.pdfIn PDF document text
    • http://asesoriagarpe.com/wp-content/plugins/formcraft/file-upload/server/content/files/160beb38552ce6---supigenifikigavi.pdfIn PDF document text
    • https://www.expoagrogto.com/wp-content/plugins/super-forms/uploads/php/files/jql8s9thpdos34lhbot2gvikn4/94064419900.pdfIn PDF document text
    • https://www.vedaaz.com/wp-content/plugins/super-forms/uploads/php/files/a9d50e3bcc508b834cb99b42c91ed1cc/50327894691.pdfIn PDF document text
    • https://rhagro.com.mx/wp-content/plugins/super-forms/uploads/php/files/e8d4df567682b874ec96bce84d8a4aad/72045865016.pdfIn PDF document text
    • http://matrixuniverzum.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16099a908542b4---19733895916.pdfIn PDF document text
    • https://udachi.co.th/wp-content/plugins/super-forms/uploads/php/files/l610rf124tlb7n2c18ee72m8ie/kufubagubukurodiberokowe.pdfIn PDF document text
    • https://tuabogadoangel.com/wp-content/plugins/super-forms/uploads/php/files/9b702bd155b2ce7ca8294e0d6716e78a/suwumenetate.pdfIn PDF document text
    • http://agiusfuneraldirectors.com/files/file/41555248391.pdfIn PDF document text
    • http://scard.vn/app/webroot/uploads/files/12637506429.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=oh+how+he+loves+us+guitar+chordsPDF link annotation
    • https://sharpspringwww.kinsta.cloud/wp-content/plugins/super-forms/uploads/php/files/5b4fff8e325832c9246546f17acc7a85/87112430526.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_off0000e325.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE325 18424 bytes
SHA-256: 3c279e38844c53e4b50d13cf9dffae9da51774defea81ca6546af96ba4187701
font_01_sfnt_off000113db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113DB 10824 bytes
SHA-256: 9df7f91f1fc7d433d3b7c0dc65b645a7682dc7ca4e3042dc0452edc05964dbb4
font_02_sfnt_off00012cde.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CDE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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