Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ed8ab167ba74ff8…

MALICIOUS

PDF

81.6 KB Created: 2021-07-19 23:18:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 40ea34cc12e4d07fbcf500f4985ec890 SHA-1: 40b47ed9129c67f52c1377b4f5b5c6c2a9e8dc36 SHA-256: 0ed8ab167ba74ff8da6ae8e3bddcd871f29ac54fa4f3780c8e73de3676658071
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm pointing to compromised WordPress upload storage and disposable hosting, suggesting it's designed to redirect users to malicious sites. The embedded URLs, such as http://multiseal.com.ph/wp-content/plugins/formcraft/file-upload/server/content/files/160f5650695809---99234566165.pdf, are key indicators of this attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://afriqueitnews.com/wp-content/plugins/super-forms/uploads/php/files/edaca9eeda7933fc2bd78b73a0ccfef1/22831075648.pdf In PDF document text
    • http://massintech.ru/img/outer/files/88250758973.pdfIn PDF document text
    • https://profbuhotchet.ru/wp-content/plugins/super-forms/uploads/php/files/ea416fc78f0c772a8fd5f7deeb031b8e/42585162071.pdfIn PDF document text
    • https://syteq-pro.com/userfiles/file/40335750217.pdfIn PDF document text
    • https://tomorrowhubs.com/upload/users/files/poxoku.pdfIn PDF document text
    • http://alpha-th.com/userfiles/file/nipibivivep.pdfIn PDF document text
    • https://myupfield.link/wp-content/plugins/super-forms/uploads/php/files/22h1jo1etefra2gqcla7v8prv8/zomuvidewofurezedozuru.pdfIn PDF document text
    • https://vidolamerica.org/wp-content/plugins/super-forms/uploads/php/files/209babe0a5445a32096c84c88ef2c991/befulakuzol.pdfIn PDF document text
    • http://multiseal.com.ph/wp-content/plugins/formcraft/file-upload/server/content/files/160f5650695809---99234566165.pdfIn PDF document text
    • http://optimus.org.au/wp-content/plugins/formcraft/file-upload/server/content/files/1606c7fc2f3ed1---59423071098.pdfIn PDF document text
    • http://www.colegiometa.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/1607122c498f28---xikifinadilajuvepep.pdfIn PDF document text
    • https://www.emma-solutions.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608bfe35d3ae7---95940507632.pdfIn PDF document text
    • https://ajitcoatings.com/uploads/puwupedumuwejofusob.pdfIn PDF document text
    • https://cashcruis.ru/wp-content/plugins/super-forms/uploads/php/files/aa6fc5fc54c56cdd772fbffeeb6a4e2b/jexuwitamezularux.pdfIn PDF document text
    • http://keifo.ru/ckfinder/userfiles/files/39849050788.pdfIn PDF document text
    • https://bonpetsupply.com/wp-content/plugins/formcraft/file-upload/server/content/files/160833e590a914---84526135790.pdfIn PDF document text
    • https://www.hinogas.com/wp-content/plugins/super-forms/uploads/php/files/rvhsajgdchdramgbtlhd3fu0c8/70642514420.pdfIn PDF document text
    • https://uaqbakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad96df1e7b2---rozosobadofanamo.pdfIn PDF document text
    • https://olgapopovaphoto.com/wp-content/plugins/super-forms/uploads/php/files/4052af154a1f9e14a21b2b76de05a70f/kufavewiduwa.pdfIn PDF document text
    • https://asset-books.com/userfiles/file/54523683613.pdfIn PDF document text
    • http://omegapizza.net/uploads/files/49769205242.pdfIn PDF document text
    • https://ltgtrends.com/wp-content/plugins/super-forms/uploads/php/files/e674b7713ebba0f299b9f41bd55a407f/65433663203.pdfIn PDF document text
    • http://ingenermarket.ru/userfiles/vivuvekodenipet.pdfIn PDF document text
    • https://www.wikiwebagency.it/wp-content/plugins/super-forms/uploads/php/files/45454dd6eb883ce267bbfb355bb885b7/25603769396.pdfIn PDF document text
    • https://fiberglasssupplydepot.com/userfiles/files/7439938340.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=craft+sip+of+healthPDF 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_off0000dcdc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCDC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f4ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4EE 16992 bytes
SHA-256: 4a654fa046ef9bd1dc2dfa7b94837479f1990ffc026c58d736120564cf778d94
font_02_sfnt_off00012191.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12191 10384 bytes
SHA-256: 9fe6b8fea23f0a1b94c1372c87690d2185e6cd6088d6d30266ab86e4f0c48a9b