Malicious PDF — malware analysis report

Static analysis result for SHA-256 34d68930e0a6c5fe…

MALICIOUS

PDF

85.7 KB Created: 2021-06-27 05:03:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: f357d9d47c2c0b6b9c69570fdc260b8d SHA-1: 70777a4af23d30e98fd14a9ff7a256f857537d9c SHA-256: 34d68930e0a6c5fe5fa2c5b498cb9a949e9abfe8e468524c02aa89d5c7903e50
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to multiple compromised WordPress sites and disposable hosting domains. These links likely serve as lures for phishing attacks or to download further malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://queure.ru/uplcv?utm_term=the+love+that+surpasses+all+understanding PDF link annotation
    • https://www.kalirich.com/wp-content/plugins/super-forms/uploads/php/files/v8dt4n3vc9l88o9lt4ajm7ge85/fujejalixubomik.pdfIn PDF document text
    • https://www.beewellrx.com/wp-content/plugins/super-forms/uploads/php/files/tmp/nenowufoj.pdfIn PDF document text
    • http://galluccifaibano.com/userfiles/file/gebeferawopulaxe.pdfIn PDF document text
    • https://llibreriaha.com/img/events/file/32872536974.pdfIn PDF document text
    • https://inclinedigital.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9b3ba422b8---wekad.pdfIn PDF document text
    • https://www.saenger-ohg.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607446ec2e2cc---sufamuditinibukosowu.pdfIn PDF document text
    • https://mangonebike.com/uploads/file/5297571322.pdfIn PDF document text
    • https://www.rockandroll.blog.br/wp-content/plugins/super-forms/uploads/php/files/9p7iigv0kgi8p5nv0p6oqnrlmk/55634195143.pdfIn PDF document text
    • http://cjatkinson.com/userimages/rinatutalifojibenojo.pdfIn PDF document text
    • http://marathon-gexin.com/Uploadfiles/files/97235758175.pdfIn PDF document text
    • http://copy2d.com/ftp/image/file/vumuvinefupu.pdfIn PDF document text
    • http://abpaluso.com/upload/file/puritupumata.pdfIn PDF document text
    • https://www.isgs.org/wp-content/plugins/super-forms/uploads/php/files/b6f59982d61f267ee3bb9223a9b699c3/82994574243.pdfIn PDF document text
    • https://brahmagnanam.org/fck_uploads/file/31024597601.pdfIn PDF document text
    • https://www.mozartcantat.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16091bb5b2d45a---mopokevefolumosinojaxila.pdfIn PDF document text
    • https://ceilford.org/wp-content/plugins/super-forms/uploads/php/files/160911d4df06435acf422a069a3277b4/34577914677.pdfIn PDF document text
    • http://rld-carbon.ru/file/ditaguvaxatubipodexebof.pdfIn PDF document text
    • http://www.ncstarim.com.tr/wp-content/plugins/super-forms/uploads/php/files/shcme69uh1fd55fbb7q99a65m1/33014250226.pdfIn PDF document text
    • https://thesmithgrouphouston.com/wp-content/plugins/super-forms/uploads/php/files/2678f02cc2e8c19d3b24bbdfc681a2b1/25139706125.pdfIn PDF document text
    • http://www.restorationservice.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16084b089052c9---famibugixe.pdfIn PDF document text
    • http://mopron.ru/upload/files/32561185790.pdfIn PDF document text
    • https://www.cedicar.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab872f7e26e---zesejumebuxizotoz.pdfIn PDF document text
    • http://dlt-nkp.com/fileupload//file/pivesabazabovazegafu.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_off0000eb86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB86 17300 bytes
SHA-256: 43f6afde2a306b23b77d165c4fdb161ebd9d573433bff7613ce49a8077783ead
font_01_sfnt_off000118c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118C4 10800 bytes
SHA-256: 493832a7bcb64b3fd1343bed7e53dece142c16e1c80c3af0d128f13c0bc33c0c
font_02_sfnt_off0001316d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1316D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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