Malicious PDF — malware analysis report

Static analysis result for SHA-256 1dd2949e39aa1b8e…

MALICIOUS

PDF

80.6 KB Created: 2021-06-26 04:31:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: bf9e0ec26e3b147bbd57c417401ac411 SHA-1: 6b0c2d4c7c6cb4e7f24cde2e7a314de4494cad9e SHA-256: 1dd2949e39aa1b8ea1e4f1be8909d1a2c5e2b6c6ccccd0fb426b4bf79105f785
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF file detected as malicious by ClamAV and an ML classifier. It contains numerous embedded URLs, many of which point to compromised WordPress sites and disposable hosting, suggesting a link farm or phishing lure. The presence of external URI heuristics and the compromised CMS upload link heuristic indicate the file's primary function is to redirect users to potentially malicious external content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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://medvor.ru/uplcv?utm_term=king+fish+ceviche PDF link annotation
    • https://www.lightingsolutionsinc.net/wp-content/plugins/super-forms/uploads/php/files/eeda686e19657598d059a837b6e081d3/46680790547.pdfIn PDF document text
    • https://kassa-evotor.ru/wp-content/plugins/super-forms/uploads/php/files/05sne3iroo4fb3nmp61vtt8tu5/tagixag.pdfIn PDF document text
    • https://trucraftsmanship.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f516f96677---bexiz.pdfIn PDF document text
    • http://orgue-chantepie.info/FCKeditor/upload/file/dizewunedizawimutedol.pdfIn PDF document text
    • https://webhostmurah.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e058887e44---dabonufezaxedufojebiz.pdfIn PDF document text
    • https://addsfly.com/userfiles/file/gipefuzodafipe.pdfIn PDF document text
    • https://adiwirawanbali.com/wp-content/plugins/super-forms/uploads/php/files/ebf9d7bfb3f77023acac87f1adf7f7f9/ralagoxovalurufuzezepo.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160bbb1db22c40---romavugotofid.pdfIn PDF document text
    • http://www.blackhillsdancecentre.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c81237d744---megufifesesugenivozifite.pdfIn PDF document text
    • http://www.onekaddy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160941739e75c9---55490321108.pdfIn PDF document text
    • https://wurstfargo.com/wp-content/plugins/super-forms/uploads/php/files/4a64390cfc6b6f68f3cef637a08be4a1/tofaxaguzenetemanobazitor.pdfIn PDF document text
    • https://mszukam.pl/dat//file/xuxiba.pdfIn PDF document text
    • https://sirikulsteel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ea81c6edd3---kuveda.pdfIn PDF document text
    • http://china-miyaco.com/img/file/2021623175751.pdfIn PDF document text
    • https://dacoma.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160a1c756a856f---porekibizadosatonozati.pdfIn PDF document text
    • https://cananalimdar.com/wp-content/plugins/super-forms/uploads/php/files/s2onh7f4somdpsqrp6hf7onfu1/15892598812.pdfIn PDF document text
    • https://www.medicalart.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160c6331dd0eae---nikoritavi.pdfIn PDF document text
    • http://www.marcelasemper.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c0080c335d2---sosepefuferebeda.pdfIn PDF document text
    • https://gearforfree.com/wp-content/plugins/super-forms/uploads/php/files/35eh327jetlfruqf1634rrqrnp/nekefazetaz.pdfIn PDF document text
    • https://swimproject.eu/wp-content/plugins/super-forms/uploads/php/files/563425330c83a5bd33548d0bac279310/mavomuru.pdfIn PDF document text
    • http://trainternational.in/wp-content/plugins/formcraft/file-upload/server/content/files/1609cfccbe1210---rovowarujifovuzuwekaliked.pdfIn PDF document text
    • http://chinahongji.com/d/files/23704697787.pdfIn PDF document text
    • http://shinex-auto.com/userfiles/file/paguleluf.pdfIn PDF document text
    • http://kameleonhastanc.hu/files/file/80049938908.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

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d852.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD852 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f069.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF069 10148 bytes
SHA-256: 6a608e3c23157a0f65b64c88c8a8d8c952422b46e40cbc8da6fca26731a6976d
font_02_sfnt_off00010700.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10700 17320 bytes
SHA-256: f4337d1f92ba40e8c8a8553a8946ab43d864bcd70eac9bcdbd84e45448415fc9

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