Malicious PDF — malware analysis report

Static analysis result for SHA-256 048e0aeb75f90280…

MALICIOUS

PDF

84.8 KB Created: 2021-07-05 12:54:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: f4ce1eca818c58a2ae1ef3848c0a56fb SHA-1: e0115bb5f5bfa9a96bdc805d2b16c6708e45fa47 SHA-256: 048e0aeb75f90280457538798d97bd37ceae470de27ab005b495ddd91a4b72f5
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier, indicating malicious intent. It contains numerous links pointing to compromised WordPress sites, suggesting it's part of a link farm designed to redirect users to malicious content. The presence of embedded URLs and the nature of the heuristics strongly suggest a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://theydeserveastamp.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b5c945043ba---19890686315.pdf
    • https://qualitycountscleaning.com/wp-content/plugins/super-forms/uploads/php/files/4bf02d55a76da2b46b2826b0a95dc402/gujanukodasowadurudidugit.pdf
    • https://certifiedmoversinc.com/wp-content/plugins/super-forms/uploads/php/files/e2046e49d28e6ad6c49d59056b863940/zunamobabuso.pdf
    • http://rymwid-training.com/userfiles/file/69364179544.pdf
    • https://yidinfo.net/wp-content/plugins/super-forms/uploads/php/files/0g33pi434oopm52inq5va378gk/34638567909.pdf
    • https://tucsonhomewindowtint.com/wp-content/plugins/super-forms/uploads/php/files/172c0cee89ed9c2565469e0050cb59f1/2523626460.pdf
    • https://webgirls-studio.com/wp-content/plugins/formcraft/file-upload/server/content/files/160da2d3b72aac---15981175197.pdf
    • http://prestizhstroycompany.ru/SITE/files/editor/file/92578462577.pdf
    • http://www.canadavisaservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d8fe087050---91722814053.pdf
    • http://www.advokat.com/app/webroot/img/fck/file/89519955605.pdf
    • http://intestinalfortitude.org/clients/0/0c/0cf504f131cb0201443a7bd449519f4a/File/jalizesuwopiniboxus.pdf
    • http://cherriestattoo.com/ckfinder/userfiles/files/luvubexirurajipoganunadeb.pdf
    • https://lakeshoresmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/i4migf4hrqq6sjlkedn49l16v6/gojokujepetelizirad.pdf
    • http://psychologkmalinowska.pl/ckfinder/userfiles/files/75329297820.pdf
    • https://webmodeli.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098a704884b0---kezupuzarojisesajal.pdf
    • http://es-umzuege-transporte.de/wp-content/plugins/super-forms/uploads/php/files/8b99d228e68337dc72d315e9238c7205/xigamutexipivewanak.pdf
    • https://dentinale.eu/wp-content/plugins/super-forms/uploads/php/files/07a0e4cdc21ab0cbca42ebf85d110b7a/87171154949.pdf
    • http://bluekeydigital.com/images/pic/file/18190311530.pdf
    • http://fogathajtohirek.hu/fckfiles/file/55618028497.pdf
    • http://www.associatedomains.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f1762468e9---netilewujedinesisu.pdf
    • https://adbetelparaguay.com/wp-content/plugins/super-forms/uploads/php/files/58878aba409529ba2abb211b24663056/kuvidal.pdf
    • http://blackshirts1962.com/clients/f/f2/f245580d3072b78cda2271cf7a7e3f61/File/3458686652.pdf
    • https://hafa-verein.de/wp-content/plugins/super-forms/uploads/php/files/64feb3b7a15874c6e70340dc8c656e57/36586185863.pdf
    • http://cloverdiamond.com/file/wilik.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=getting+confidence+back
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e93b.bin
235b7e61c54559a8c2003dd396b8cf8c397afbed98964e9ba0cfdf3a413f3a91
pdf-font-stream PDF embedded font (sfnt) at offset 0xE93B 16668 bytes
font_01_sfnt_off00011404.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11404 16792 bytes
font_02_sfnt_off00012c1b.bin
bd509d468f45d4e393dbbbf73df51763123ed693e20c8b10810d39a233b8841c
pdf-font-stream PDF embedded font (sfnt) at offset 0x12C1B 10608 bytes