Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e4e6991bc0544da…

MALICIOUS

PDF

95.7 KB Created: 2021-08-03 03:41:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 32e3d467bf301b07acc677d28c84bccd SHA-1: 5a51638cc137c30f1abd8e3bfb546baf8b771e13 SHA-256: 0e4e6991bc0544daf35818055f1d3d49995392c61bfce49919e589b3cf0b74e9
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier with high confidence. It contains numerous links to external websites, many hosted on compromised WordPress sites, suggesting a phishing or malware distribution campaign. The presence of PDF_URI and PDF_SEO_DISPOSABLE_LINK_FARM heuristics indicates a deliberate attempt to create link farms on disposable hosting, likely to evade detection and distribute malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9984

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://allytemp.ru/uplcv?utm_term=cryptography+and+network+security+forouzan+3rd+edition+ppt PDF link annotation
    • https://takiminsahada.com/wp-content/plugins/super-forms/uploads/php/files/6a68qd6mjmdl7p90cinudfpprf/13545623159.pdfIn PDF document text
    • https://gaseg.com/wp-content/plugins/super-forms/uploads/php/files/csq1nqkvn05eoctn95v8dskug1/fumixativemukinepafe.pdfIn PDF document text
    • https://soechi.net/userfiles/file/29659963093.pdfIn PDF document text
    • https://tcremich.lu/files/files/84148153561.pdfIn PDF document text
    • http://witnesstherealist.com/wp-content/plugins/super-forms/uploads/php/files/1a01f2146d5b55c84fb259df2d6f8f33/monamamupuzo.pdfIn PDF document text
    • http://ontheedgeofnow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cc183b8a718---xakezurepus.pdfIn PDF document text
    • http://seamacros.com/upload/file/fatarofinozozapu.pdfIn PDF document text
    • http://www.medicalalliedtraining.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c61282c3832---3092619755.pdfIn PDF document text
    • http://balone.net/_upload/file///58168343359.pdfIn PDF document text
    • http://hopkinshigh62.com/clients/7/77/7764523e397120ad9b09b1da26998858/File/87003035977.pdfIn PDF document text
    • https://yarsan.ru/wp-content/plugins/super-forms/uploads/php/files/42d6801df2cbacc4676e78e560c9fd1a/finujow.pdfIn PDF document text
    • http://barrospizzadb.com/uploads/files/zijijekategeluke.pdfIn PDF document text
    • https://digicpictures.com/downloads/lasofadozofagexuv.pdfIn PDF document text
    • http://benthanhsgfarm.net/images/uploads/files/zukipogarigo.pdfIn PDF document text
    • https://joyfool.art/wp-content/plugins/super-forms/uploads/php/files/b2f08edfe41480a03353b69f97566456/24452672460.pdfIn PDF document text
    • http://sakem.org/userfiles/files/99052316457.pdfIn PDF document text
    • http://akinmedikal.com/uploads/file/37718134838.pdfIn PDF document text
    • https://supportsystemsvainc.com/home/ssvi/public_html/ckfinder/userfiles/files/38836879033.pdfIn PDF document text
    • http://mtsskzy.com/userfiles/file/27988781078.pdfIn PDF document text
    • https://www.andeanskyline.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d9640558b9---96393149094.pdfIn PDF document text
    • http://celcg.pl/uploaded/file/duwinun.pdfIn PDF document text
    • https://sproname.com/files/userfiles/files/regavetufijo.pdfIn PDF document text
    • https://uaqbakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b89cb1b799---fimuvilaturezit.pdfIn PDF document text
    • https://jaunimodienos.lt/wp-content/plugins/super-forms/uploads/php/files/uv6s5vo2h9desme5fpjdpl53m8/lolenoverepatesozo.pdfIn PDF document text
    • https://oknoplus-omsk.ru/wp-content/plugins/super-forms/uploads/php/files/aa6cf3af5f9bf23a215e05c81fbb78e0/59171938353.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_off00010f6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F6D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00012784.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12784 11508 bytes
SHA-256: 9346593e6b2b5f87f112187ac05dc7f106a3524e7dac41bde5c7024c01fd9e7c
font_02_sfnt_off000142b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x142B0 17044 bytes
SHA-256: d978f54db551d6f844a077a476f331278ff3f74594b39cf5dc7ccc44fb4d5bdf

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