Malicious PDF — malware analysis report

Static analysis result for SHA-256 3df212d5c77388d7…

MALICIOUS

PDF

83.6 KB Created: 2021-09-02 00:13:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: ceae81a743a1b7332c4bdcb4009bc3ec SHA-1: 6afe31036a542aeb2a1462d3e503ccfdfd13b8fa SHA-256: 3df212d5c77388d7aca48b9d22357c12bd7bc35fff89a77d8874c0425278f210
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating it's likely a phishing or trojan delivery mechanism. The file functions as a link farm, containing numerous URLs pointing to compromised WordPress sites, which likely serve as a distribution point for further malicious content. The presence of multiple distinct hosts and the use of UTM parameters suggest an attempt to obscure the final destination and potentially track user engagement with the phishing lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://smarttactic.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1608f772d8e22d---26397274621.pdf In PDF document text
    • https://space1500.com/wp-content/plugins/super-forms/uploads/php/files/6a37a20913ab3c4dc33eb1e4eda5ee01/48173826190.pdfIn PDF document text
    • https://marcuspietrek.de/MARCUS/files/file/38959669852.pdfIn PDF document text
    • https://christembassybarking.org/wp-content/plugins/super-forms/uploads/php/files/0873dfe013ea10e1a34cb558bd4b8c53/15461705392.pdfIn PDF document text
    • https://deltarealestate-eg.com/userfiles/file/dekenojin.pdfIn PDF document text
    • http://www.unidacardoso.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1610d2a6ad95fe---piniza.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b1947ed3a4d---60259459606.pdfIn PDF document text
    • https://www.hungarianassociation.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083fd8f81e8d---80754616308.pdfIn PDF document text
    • http://soflocops.com/clients/67403/File/15222968096.pdfIn PDF document text
    • http://www.ponderosafestival.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078e49d51da1---72906121416.pdfIn PDF document text
    • http://wbbray.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087487d28190---loweleve.pdfIn PDF document text
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/55564559f73ea8860a0ca142d630c1fe/wesagagemiwosu.pdfIn PDF document text
    • http://studiotecnicodambra.eu/userfiles/files/namofewonuxamuse.pdfIn PDF document text
    • http://www.iso-clean.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1606eec5de3641---tefate.pdfIn PDF document text
    • http://www.onlinetemsilci.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d329c8cb10---8934880045.pdfIn PDF document text
    • http://zonwering-nederland.eu/ckfinder/userfiles/files/13081081749.pdfIn PDF document text
    • http://innovatepc.com/userfiles/file/nigifutapab.pdfIn PDF document text
    • http://sistersaviopublicschool.com/userfiles/file/93231418954.pdfIn PDF document text
    • https://gradeagroup.com/wp-content/plugins/super-forms/uploads/php/files/kp137f7k2gooq1v54a09n3mt0e/22576471903.pdfIn PDF document text
    • https://agilitynd.com/wp-content/plugins/super-forms/uploads/php/files/1e34ef3d6f338d9a242bab7e043b2a22/lufanodojuvegixaraded.pdfIn PDF document text
    • https://photographerin.agency/wp-content/plugins/super-forms/uploads/php/files/gcdeik34cdul3n2plvq0ji6783/bigikenegunisadipowipeje.pdfIn PDF document text
    • https://massagetheory.ca/wp-content/plugins/super-forms/uploads/php/files/9fe65ded684c9bf2dd68f1897e1da72c/xolopuna.pdfIn PDF document text
    • http://ascensionchina.com/userfiles/file/kijonux.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=different+fonts+for+tattoos+generatorPDF 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

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_off0000e342.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE342 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fb54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB54 17388 bytes
SHA-256: ced2a5b1a3bb1a9c8759ef353aab493d9121e97c8a09cb462ae7bc78f3e3ac8b
font_02_sfnt_off00012849.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12849 10344 bytes
SHA-256: 1e9da117ad4395424a20ef07df83141360f83701e4074838dd6f43c476c6f6ea

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