Malicious PDF — malware analysis report

Static analysis result for SHA-256 766b133acbee41c7…

MALICIOUS

PDF

81.8 KB Created: 2021-09-19 04:55:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 97d16049a09c17535d9d5d9a732faf8c SHA-1: 8a9255a4026fddc2962b51c67cd60cda6c5acd4d SHA-256: 766b133acbee41c7b747703a98cc2186c5064aa47d091920276e2669a778f40b
172 Risk Score

Malware Insights

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

This PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. It contains embedded JavaScript and a link farm pointing to compromised WordPress uploads and other disposable hosting, suggesting it's designed to deliver a payload or redirect users to malicious sites. The presence of a visual download button further supports a phishing or social engineering lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

Heuristics 8

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://garglob.ru/uplcv?utm_term=where+is+facebook+data+stored+in+android PDF link annotation
    • http://oasishs.com/uploads/files/20210916_042223.pdfIn PDF document text
    • http://akicgiyim.com/userfiles/file/96437042940.pdfIn PDF document text
    • http://otevrel.eu/ckfinder/userfiles/files/xewemozalugogudaxojegetop.pdfIn PDF document text
    • http://custom-mugs-factory.com/uploadfile/files/61087712657.pdfIn PDF document text
    • https://sanvexe.vn/webroot/img/files/kivasapexefaziboxajujevi.pdfIn PDF document text
    • https://eastmangroup.org/ckfinder/userfiles/files/1801547015.pdfIn PDF document text
    • http://nawooelcs.com/upload/userfiles/2021/09/files/210913085959.pdfIn PDF document text
    • http://tipkeo.com/js/ckfinder/userfiles/files/84581911360.pdfIn PDF document text
    • https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/hclkv7gs8uured75sj2l1sbk51/seximogora.pdfIn PDF document text
    • http://abwmercury.com/uploads/files/11131178518.pdfIn PDF document text
    • http://esangsok.com/upfile/files/pewum.pdfIn PDF document text
    • http://archissimo.eu/userfiles/files/bapavizumatajuzotul.pdfIn PDF document text
    • https://maloneslandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613c8d7506d69---11474166511.pdfIn PDF document text
    • http://ducthai.vn/userfiles/file/vugojosibi.pdfIn PDF document text
    • https://brazilairporttransfers.com/ckfinder/userfiles/files/54745448992.pdfIn PDF document text
    • http://xn--42-6kcdlkbomh7beggito5p.xn--p1ai/userfiles/file/doroka.pdfIn PDF document text
    • http://ttlengenharia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16137243cae1d0---2056241231.pdfIn PDF document text
    • https://trompis-tondschungel.de/userfiles/file/wufawirutazeri.pdfIn PDF document text
    • http://hoangle.vn/uploads/userfiles/file/nowedawapusomaro.pdfIn PDF document text
    • http://socialbomjesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/16134a9242a7d0---xejovarexinojat.pdfIn PDF document text
    • http://studiotecnicodambra.eu/userfiles/files/gedujomapo.pdfIn PDF document text
    • http://lonniestireandauto.com/nbloom/fckuploads/file/wuxurukupis.pdfIn PDF document text
    • http://bakersfield.thepokeluau.com/uploads/files/forodapexafuboxora.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_off0000d72b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD72B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ef3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF3D 19096 bytes
SHA-256: 7444d4726d42b5ba885c00a90e5c36850e84bf136bd5f8091e8c7bff023739d0
font_02_sfnt_off000120bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120BC 10752 bytes
SHA-256: 611e8e3aa7869158987c5c770873de9e7df148120851426b2c9f5d20c4d397b9

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