Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae2bce9edea29e4e…

MALICIOUS

PDF

111.0 KB Created: 2021-06-30 19:50:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: b04987ac7e4fbc864510265587f3f2e6 SHA-1: 6e5d210a4014ec505719135d503fd13b18870cbe SHA-256: ae2bce9edea29e4e6088915e4b7bc9a37ef981db15754d31e12faf4039cf9290
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised WordPress sites, suggesting it's designed as a link farm to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery via external links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9886

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://homeaestheticsllc.com/wp-content/plugins/super-forms/uploads/php/files/2ba7c2ab1ceb06d78d614e90e61183e3/jefapekela.pdf In PDF document text
    • https://roadtoring.com/wp-content/plugins/super-forms/uploads/php/files/e274efcdc723f0a267a2f1b8cf8a67bf/neradejakexaromifexo.pdfIn PDF document text
    • http://etenindex.nl/images/uploads/53707855048.pdfIn PDF document text
    • https://louvre.lv/res/wysiwyg/file/79926198286.pdfIn PDF document text
    • https://nowbali.co.id/wp-content/plugins/formcraft/file-upload/server/content/files/1607cfa1928724---21931539515.pdfIn PDF document text
    • https://camile.vn/wp-content/plugins/super-forms/uploads/php/files/s016qo24bbn1kld37lgveiionq/84526449967.pdfIn PDF document text
    • http://truhlarstvisollner.cz/data/file/66159269055.pdfIn PDF document text
    • http://cjatkinson.com/userimages/girasofinibisekereg.pdfIn PDF document text
    • http://getawaynewzealand.co.nz/wp-content/plugins/formcraft/file-upload/server/content/files/16098fe310310d---74677176275.pdfIn PDF document text
    • http://3duct.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e6fdde8179---xumunosokodutipoxatemon.pdfIn PDF document text
    • https://tangente-mag.com/img/file/vizaselomerajolarexi.pdfIn PDF document text
    • https://amenagementsoleil.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d5e61c3f5a9---xipakitukutimumuw.pdfIn PDF document text
    • https://thewentworthco.com/wp-content/plugins/super-forms/uploads/php/files/qsk892rk9dcugnk2gsk5esvvjn/48402672982.pdfIn PDF document text
    • http://www.phonefixcomo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b09ad5dedf4---lewogivolavatok.pdfIn PDF document text
    • http://elonsummerstorage.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c57d1fab108---libilitovisujig.pdfIn PDF document text
    • http://famcareconnect.org/wp-content/plugins/formcraft/file-upload/server/content/files/1606c8a9f042b9---nefax.pdfIn PDF document text
    • https://veritiesinstitute.com/wp-content/plugins/super-forms/uploads/php/files/1c9983d45775736a55af80cb27e632d4/nutubetigelarabumaxuw.pdfIn PDF document text
    • http://bochosushi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b1efd93799---famobisuzuvatud.pdfIn PDF document text
    • https://siyata.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/16086707b08ab4---nefebugeze.pdfIn PDF document text
    • https://globalazeri.az/wp-content/plugins/super-forms/uploads/php/files/tjkj34s2bi57jti7onucqmfr26/bolaxinovusalotef.pdfIn PDF document text
    • https://extremetour74.ru/wp-content/plugins/super-forms/uploads/php/files/a25abe3378dc588bffdcfb923ea87179/kuravovefapuwejixukababow.pdfIn PDF document text
    • http://maslag.eu/userfiles/file/68620127515.pdfIn PDF document text
    • http://altaprecision.com/userfiles/file/juzuxebuwujibubuj.pdfIn PDF document text
    • http://www.skupp.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160706fb3cb433---poxixujemez.pdfIn PDF document text
    • http://hillsdalehorseboarding.com/ckfinder/userfiles/files/sarano.pdfIn PDF document text
    • https://bamor.org/userfiles/file/35284625355.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=carl+rogers+approach+to+counsellingPDF 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_off00014da9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14DA9 10784 bytes
SHA-256: ebb2b9f56edb2e84f377c4028e2f8e853f93e71dffb7d2406c4d11c2395a04c2
font_01_sfnt_off00016678.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16678 18080 bytes
SHA-256: 20aa5123c9bbd93ec5263c6a917c7acd6fe1c082151cf0a634cb6e6701a26f55
font_02_sfnt_off00019658.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19658 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1