Malicious PDF — malware analysis report

Static analysis result for SHA-256 af8a99d210c8279a…

MALICIOUS

PDF

98.5 KB Created: 2021-07-06 22:20:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 9cc2d6255d6cec740d8c56987956b69c SHA-1: e1fdfe5df9c318769cddd9b027d6982d714496ae SHA-256: af8a99d210c8279ac923886dc5425794f6575c40af0fa08a07b352003bdf68b4
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external links, many pointing to compromised WordPress sites or disposable hosting, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and link farm behavior are indicative of malicious redirection tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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://irlanc.ru/uplcv?utm_term=the+last+of+the+mohicans+2 PDF link annotation
    • https://dm288.rs/slicice/file/17169549015.pdfIn PDF document text
    • https://www.ezhealthcheck.com/wp-content/plugins/super-forms/uploads/php/files/u41nht3ton0rgihurdeoo7s7kf/kibaroxu.pdfIn PDF document text
    • https://mrmusicfoundation.org/wp-content/plugins/super-forms/uploads/php/files/c9vfu9rf2e0fopkej2gcsb0dja/kuvabadenux.pdfIn PDF document text
    • https://www.tangelo.no/wp-content/plugins/formcraft/file-upload/server/content/files/1608f1415a8d94---37122528596.pdfIn PDF document text
    • https://www.taxikladis.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160726e839ba9b---dalagozepajig.pdfIn PDF document text
    • https://nothingbutsafetyglasses.com/userfiles/file/88632745188.pdfIn PDF document text
    • https://maxim-catering.de/wp-content/plugins/super-forms/uploads/php/files/75eodqbhbgc82koqpue50geaqq/jesogemezeteni.pdfIn PDF document text
    • http://score1forspencer.com/clients/4/45/4587145e2679cb7673d0e21b436e5c25/File/90686141321.pdfIn PDF document text
    • https://urbanplace.me/wp-content/plugins/super-forms/uploads/php/files/3f59bde00880061dbf9d1c0fcd78d8ec/56201852628.pdfIn PDF document text
    • http://global-poseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081d0a4bf855---zamolumo.pdfIn PDF document text
    • http://anhuishangbiao.com/upload_fck/file/2021-5-14/20210514195348471831.pdfIn PDF document text
    • https://dmddsgn.com/wp-content/plugins/super-forms/uploads/php/files/a2dc24da517ce442294cdcafe4403323/sazolewegogevafiledivev.pdfIn PDF document text
    • http://kovacsoltvaskerites.hu/images/file/74961452304.pdfIn PDF document text
    • https://isabellepieman.com/userfiles/file/banifoniwaxivibovapamefa.pdfIn PDF document text
    • http://www.bewegeninarnhem.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160759ff1da434---sesuzo.pdfIn PDF document text
    • https://ascinfratech.com/clientprojects/trading/file/fedowexuwo.pdfIn PDF document text
    • https://sasalidayanisma.org/uploads/file/litonowuf.pdfIn PDF document text
    • http://bigpictureresources.com/userfilesbigpicture/file/luvojejeketu.pdfIn PDF document text
    • http://grupogmec.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a56ec180f91---42926890759.pdfIn PDF document text
    • http://bilagroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c67bf50421f---75946029610.pdfIn PDF document text
    • http://pavcargo.ru/wp-content/plugins/super-forms/uploads/php/files/6e433393282048cda46b77a33699650d/ponifadijopabej.pdfIn PDF document text
    • http://vankouwenenmastop.nl/UserFiles/file/garuvexuke.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_off000120bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120BB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000138cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x138CD 16920 bytes
SHA-256: 3fcd7f4d35c3f85910d608c20167c686cf6ff395a9c1e4084479b74892810b0c
font_02_sfnt_off000164dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x164DC 10584 bytes
SHA-256: 6cb776be4f3f43443e064a0a7c8642aaac9cb2d213229d1ee38f162f8386cf69

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