Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e5d38a061099415…

MALICIOUS

PDF

129.2 KB Created: 2021-06-30 05:00:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 8ce947440acf47373eee8367b712a339 SHA-1: c752ccb4fea3518260dce4b0047dc5f2cec544c6 SHA-256: 7e5d38a061099415596f0ffb63227255552be19d2022aa86043501d67d528d15
196 Risk Score

Malware Insights

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

This PDF document is classified as malicious by ML models and ClamAV, exhibiting characteristics of a social engineering attack (ClickFix). It contains numerous links to external sites, many of which appear to be part of link farms hosted on potentially compromised or disposable domains. The document's structure and embedded URLs suggest an attempt to lure the user into downloading and executing further malicious content, likely by instructing them to run commands directly.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9813

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • ClickFix social engineering attack high SE_CLICKFIX
    Document instructs the user to press Win+R or paste a command into a terminal — consistent with ClickFix attacks that bypass macro restrictions by tricking users into running malicious commands directly
  • 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://infrive.ru/uplcv?utm_term=pink+slip+nfs+most+wanted+ps2 PDF link annotation
    • http://detikakdeti.ru/img/file/77924032847.pdfIn PDF document text
    • http://www.cafeinca.com/img/public/contenido/file/11762010532.pdfIn PDF document text
    • https://palcev.ru/userfiles/file/71839736413.pdfIn PDF document text
    • https://swotin.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080f5d233103---tegipomekutipab.pdfIn PDF document text
    • http://dmkaudit.sk/101/upload/file/97440296577.pdfIn PDF document text
    • http://ruilong-ironwork.com/CKEdit/upload/files/pezupitiwuwizigud.pdfIn PDF document text
    • http://teaandtiarasottawa.org/clients/e/e8/e8f54e69a7463df9fd0adff13cd8e90f/File/tapaze.pdfIn PDF document text
    • https://ajwatravel.com/wheelmarine/userfiles/file/wemupis.pdfIn PDF document text
    • https://glowskincare.net/wp-content/plugins/super-forms/uploads/php/files/8edfb3f361fc3666aa86cd27433d24fb/4950939355.pdfIn PDF document text
    • https://www.letspassdriving.co.uk/wp-content/plugins/super-forms/uploads/php/files/0kklldcql1onlh91j6q29imgg5/zonaferiv.pdfIn PDF document text
    • https://faceless.me/userfiles/files/11069637396.pdfIn PDF document text
    • https://sg-design.top/wp-content/plugins/super-forms/uploads/php/files/7c96e6e3f8de6212ee88707681444784/53608628953.pdfIn PDF document text
    • https://malimbe.africa/wp-content/plugins/super-forms/uploads/php/files/c46f1b4ca0da3dd58bc489b09be5a6ae/jemuxaxusolowivujuni.pdfIn PDF document text
    • http://mineraux-et-lithotherapie.fr/ckeditor/upload/files/73843617123.pdfIn PDF document text
    • https://www.accidentinjurylascruces.com/wp-content/plugins/super-forms/uploads/php/files/61avs69r4s76ms0e2druandajd/menafofemepi.pdfIn PDF document text
    • http://www.x454.com/wp-content/plugins/super-forms/uploads/php/files/p6ijdar73jesv75fvn1oqkp7s2/62527818853.pdfIn PDF document text
    • https://ecoinkworld.com/wp-content/plugins/super-forms/uploads/php/files/e2d2519643124d15af86baab53982dcd/buburilak.pdfIn PDF document text
    • https://www.ppmcare.co.uk/wp-content/plugins/super-forms/uploads/php/files/fiob8t24suugi5p01v9jrc9pkm/milogifinawezi.pdfIn PDF document text
    • http://www.radiopopiatej.com/wp-content/plugins/formcraft/file-upload/server/content/files/160772e8d5dad1---xubinifonu.pdfIn PDF document text
    • https://www.scilights.com/wp-content/plugins/super-forms/uploads/php/files/585b66b802305ea23568ba81c83f47ec/98018548705.pdfIn PDF document text
    • http://dispensapertutti.com/userfiles/files/15135621463.pdfIn PDF document text
    • https://rybczewice.pl/userfiles/file/74334930657.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad89a51b258---vufuzabivipexegozokuz.pdfIn PDF document text
    • http://topopentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7e44f2e73e---72772465491.pdfIn PDF document text
    • https://www.ideaklinikkadikoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609be6a79afe8---wivopurefozoxilemut.pdfIn PDF document text
    • https://realestateconnect.biz/wp-content/plugins/super-forms/uploads/php/files/op2rfvaa663lp14ir36latud26/xomorevelirufagivu.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_off000195bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x195BC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001add3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1ADD3 10860 bytes
SHA-256: 7a71746c2f60b7138833b27be90214f0e36aeca42219e9d6c7e649b7173d9f61
font_02_sfnt_off0001c6fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C6FC 18212 bytes
SHA-256: b6cb64151f3312aa6a8d2c804a45b7b03f629a998f87fbd67afd36a708a00bd2

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