Malicious PDF — malware analysis report

Static analysis result for SHA-256 d409f833ae298f29…

MALICIOUS

PDF

93.1 KB Created: 2021-06-11 19:51:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 7bcfb52fab79b200845e350a35756fe9 SHA-1: 680ce99b13e8e6811c6cb9dca83cc6170b6e7843 SHA-256: d409f833ae298f29a5f96cc9a3f4f35e3999453d575322b17b7998991dab3796
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The document body and embedded URLs suggest a phishing or scam lure, specifically disguised as a search result for MP3 downloads. The presence of numerous external URIs, many hosted on compromised WordPress sites or disposable hosting, further supports this assessment. No scripts were extracted, but the overall structure and URL patterns are consistent with a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://chcial.ru/uplcv?utm_term=in+my+feelings+drake+mp3+download PDF link annotation
    • http://anhuicrew.com/upload_fck/file/2021-5-17/20210517002233238108.pdfIn PDF document text
    • http://riskhedgetech.com/uploaded/file/123333934060976a5751cc9.pdfIn PDF document text
    • https://autotrilogy.com/wp-content/plugins/super-forms/uploads/php/files/9dc04f7ec546d6b37af48378f27d137d/loritanotozibedibaz.pdfIn PDF document text
    • https://siyata.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160b40093c7ec1---mirusizakogu.pdfIn PDF document text
    • https://mfdesign.hu/files/file/10351162300.pdfIn PDF document text
    • http://www.kmclogistics.com/wp-content/plugins/super-forms/uploads/php/files/9688f2100495f901aab47eb1824e7fd0/29374494641.pdfIn PDF document text
    • http://flatadministration.com/uploades/fckeditorfile/jikofav.pdfIn PDF document text
    • http://proxima-design.cz/files/file/31110386635.pdfIn PDF document text
    • https://www.tai.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160884910bcfda---88913905636.pdfIn PDF document text
    • https://completecollegestrategies.com/wp-content/plugins/super-forms/uploads/php/files/439d00a217161726716a512155bb1ccc/10979077930.pdfIn PDF document text
    • https://advancedcheckcashadvance.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070ba82de7dd---31194360446.pdfIn PDF document text
    • https://www.reparaciondebomba.com.ar/wp-content/plugins/super-forms/uploads/php/files/p82tvq3bm6omclqq76k1lrqkh1/53381243042.pdfIn PDF document text
    • https://beautifullifeuk.com/wp-content/plugins/super-forms/uploads/php/files/221b4474a94219ba7f3d452e6a49625a/70475785685.pdfIn PDF document text
    • https://tecnibat.net/uploads/archivos/94972147697.pdfIn PDF document text
    • https://mamproducciones.es/wp-content/plugins/formcraft/file-upload/server/content/files/1606ffed88da8d---timanowemozekifenamum.pdfIn PDF document text
    • https://homini.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160773d8263289---jipovubilufekoduzobozur.pdfIn PDF document text
    • https://www.taxikladis.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160a0e2299b0a2---dojeneveju.pdfIn PDF document text
    • https://accuratesearch.com/userfiles/file/57209756283.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ddc2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDC2 6928 bytes
SHA-256: 024be9eb583d43cd04946c7f78fadfdffa8f91a6edef386ef5b0a22df2c94b14
font_01_sfnt_off0000ef5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF5B 5720 bytes
SHA-256: fdccf6c7a46d2f116489ef6ad1968c9742f06e78e90f1349112ccc8b2bfc0f90
font_02_sfnt_off000102db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102DB 5448 bytes
SHA-256: 22f8dcff52c4fb7dd3124e59483e7c3a1aa127249abee177b71f51b6709c7f0a
font_03_sfnt_off00011715.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11715 13480 bytes
SHA-256: 3359db6bb33c5a8d7b9a913bff9dc401e299b12e6a8021f0678158ece64067db
font_04_sfnt_off00014323.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14323 19808 bytes
SHA-256: 3ce706224dd4bbbfdba28f7ca674985ec21dfac4f09f73e24e5001783882e3e6

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