Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ea5d74dbb30d1ef…

MALICIOUS

PDF

89.8 KB Created: 2021-09-01 17:14:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 0fa4d788f8b122e6223dd1395d6d9b9c SHA-1: 760060126a2549868a08a71f11bd96614ea3e702 SHA-256: 8ea5d74dbb30d1efa8022c6a1058c4a0e608f1e4e9625173278b53c0dd4300e9
156 Risk Score

Malware Insights

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

The PDF contains a large number of links, many pointing to compromised WordPress sites, suggesting it functions as a link farm. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are indicative of a malicious document designed to lure users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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://gmonlinestore.com/wp-content/plugins/formcraft/file-upload/server/content/files/160723ec873459---84314033165.pdf In PDF document text
    • http://xn--2osv9pt2jfpt.com/uploadfiles/files/badijumokelidofamizukov.pdfIn PDF document text
    • https://hotelristorantenovecento.it/wp-content/plugins/super-forms/uploads/php/files/3ac3a4d22942de5773547ed290648463/mafaboj.pdfIn PDF document text
    • https://thuaphatlaihoanghuy.com/uploads/files/wunetaxajufasunomuxufedi.pdfIn PDF document text
    • https://tidurmalam.com/contents//files/85056851587.pdfIn PDF document text
    • http://famillespourstarlight.com/clients/a/a9/a9b42c05011d3bb27e7f7ec2ed30324f/File/mufis.pdfIn PDF document text
    • https://www.edmcenter.xyz/ckfinder/userfiles/files/watujovoleduvipevo.pdfIn PDF document text
    • http://www.contectrade.hu/fckfiles/file/68530513533.pdfIn PDF document text
    • https://etcbt.com/userfiles/file/pidaditexubelakavo.pdfIn PDF document text
    • https://georgiamusicpartners.org/wp-content/plugins/super-forms/uploads/php/files/df008323e72bf7ff15cfc3dfb86fbf58/nisulezitidesewofed.pdfIn PDF document text
    • https://shinyjewellers.com/wp-content/plugins/super-forms/uploads/php/files/e2ge0hb3t8lbcfr0va8r0d1vbj/kegobisavesid.pdfIn PDF document text
    • https://israelonthehouse.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091d05842d07---21577194825.pdfIn PDF document text
    • https://www.scilights.com/wp-content/plugins/super-forms/uploads/php/files/fff2f3c0e8dd954dbbc48aaab7e7acb9/35676520047.pdfIn PDF document text
    • https://bikinibody.be/wp-content/plugins/super-forms/uploads/php/files/i58763tqsbdstcvrdlgmidtpdb/41867361923.pdfIn PDF document text
    • https://skvely-kup.cz/files/file/tujirekogexunomuxijin.pdfIn PDF document text
    • https://www.toptalentusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083a0408d42c---1059945524.pdfIn PDF document text
    • https://tainandentist.com/uploads/files/202109010609591035.pdfIn PDF document text
    • https://coluer.ir/documents/file/2763648864.pdfIn PDF document text
    • https://fibaquitaine.fr/cebatrama/userfiles/files/vigasiwidanuxom.pdfIn PDF document text
    • http://www.trimbleexpress.sk/wp-content/plugins/formcraft/file-upload/server/content/files/160c8ec7615f25---66149681046.pdfIn PDF document text
    • http://www.radiopopiatej.com/wp-content/plugins/formcraft/file-upload/server/content/files/16112b1a65a389---11501116189.pdfIn PDF document text
    • http://stainless-faucet.com/uploads/htmlupload/files/kibofanemivetumulel.pdfIn PDF document text
    • https://www.mysmilestudios.com/wp-content/plugins/super-forms/uploads/php/files/91ac087b42fb23f22666a53ce289bae1/53587717297.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=no+water+flow+to+toiletPDF link annotation
    • 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_off0000fad1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAD1 18616 bytes
SHA-256: 465cd2b600b50c5a91b65f5f60a95ff7252001bf5b6b4fdf25b72896cee2f602
font_01_sfnt_off00012b6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B6F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00014386.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14386 10000 bytes
SHA-256: 6b8520eeb4ed079f2aa1ed43ad4fef781f29a9854b1a4f09506508bc4f447d55

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