Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe05ed2bbe0ef250…

MALICIOUS

PDF

150.3 KB Created: 2021-07-04 22:48:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 92bc8ccaac83cb3577e28f7c617999df SHA-1: b1e6d558b42275e81509e91094b4990004c8fbd0 SHA-256: fe05ed2bbe0ef250c0fb8d28dff39cce1f45bec964711ab9defce96539baf6e8
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to compromised WordPress sites and disposable hosting, indicating it functions as a link farm. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or distributing further malware. Although no scripts were explicitly extracted, the nature of the links suggests an attempt to lure users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9523

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 https://smidgel.ru/uplcv?utm_term=define+justification+by+faith PDF link annotation
    • https://www.glasswindowequipment.com/wp-content/plugins/super-forms/uploads/php/files/58bb5f7d0c1c24aaf9241a22f9df0430/juwat.pdfIn PDF document text
    • http://handinks.com/ckfinder/images_store/files/bosidote.pdfIn PDF document text
    • http://www.melodypods.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075aeee412d6---temomazu.pdfIn PDF document text
    • http://novussiteyonetimi.com/uploads/file/45341849437.pdfIn PDF document text
    • https://vickers-electronics.co.uk/wp-content/plugins/super-forms/uploads/php/files/17f56242133d9653ca75088cce5dd6aa/12455227727.pdfIn PDF document text
    • http://dgjinhak.kr/DATA/upload/files/202106050538082912.pdfIn PDF document text
    • http://wajl.net/img/file/202161951124.pdfIn PDF document text
    • https://marksiegeldds.com/wp-content/plugins/super-forms/uploads/php/files/bfb3a9f7057d5265bc4c7f14a56d6962/jowurapidojibidosubu.pdfIn PDF document text
    • https://robertmatzuzi-massagetherapist.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1606d2ca88a049---nemejewaxikutexasigowun.pdfIn PDF document text
    • http://jamoncup.es/wp-content/plugins/formcraft/file-upload/server/content/files/16093e71b785b8---45649797278.pdfIn PDF document text
    • http://kuresi-kaitori.com/upload/content_pic/files/xafujokavoxojakoze.pdfIn PDF document text
    • https://bringem.de/wp-content/plugins/super-forms/uploads/php/files/f31d5e477420065b7d21ee8448848a0b/40833441353.pdfIn PDF document text
    • https://nutstudio.it/userfiles/file/zajupameniditufewidabuxem.pdfIn PDF document text
    • https://hps-gruppe.com/wp-content/plugins/super-forms/uploads/php/files/kv8vu3am2acqoeqd0jiuqq9qsr/48292622516.pdfIn PDF document text
    • https://www.sir.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607b59063b653---zotokosetir.pdfIn PDF document text
    • https://www.advids.io/wp-content/plugins/formcraft/file-upload/server/content/files/1608f54d585f78---21819823458.pdfIn PDF document text
    • http://aclamerica.com/customers/CMS-IMAGES/file/nudoxitukegozeko.pdfIn PDF document text
    • https://www.auditek.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16084dcf7a131e---26833994711.pdfIn PDF document text
    • https://revapackers.com/wp-content/plugins/super-forms/uploads/php/files/4u0dt2terfrtja4mict2uua61g/44188845173.pdfIn PDF document text
    • http://opalbiosciences.com/wp-content/plugins/formcraft/file-upload/server/content/files/160825b2d92a1d---91521740261.pdfIn PDF document text
    • https://izharfoster.com/wp-content/plugins/formcraft/file-upload/server/content/files/160813897b1432---486195849.pdfIn PDF document text
    • https://masterok-kovka.ru/wp-content/plugins/super-forms/uploads/php/files/ad83dd86685af4c0e8ec6cf4d3b67e82/voloxomejelusub.pdfIn PDF document text
    • https://ludifrance.fr/userfiles/file/jozutefedizovakulikas.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001b41a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B41A 17016 bytes
SHA-256: 267a9d1cf9d0ddbd1f8dca31594194d6aee4a1fbf4c6ae318affb3f197c25fe0
font_01_sfnt_off0001ccb5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1CCB5 3004 bytes
SHA-256: e49c37709245d393f63f9ba9c1e0548fab5e13d8cad2ce7431b20479fbc6271e
font_02_sfnt_off0001d902.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1D902 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off0001f119.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1F119 10772 bytes
SHA-256: b139e3694876a6bef1b9e729a3751281e713297422d16d0c1853c60a9115195a
font_04_sfnt_off000209e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x209E0 26408 bytes
SHA-256: 55005e121da3cea581ad4e0ef680d7a55074eaa36616da4c2577241c437f3ff5

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