Malicious PDF — malware analysis report

Static analysis result for SHA-256 7097d5a816b3138d…

MALICIOUS

PDF

93.2 KB Created: 2021-07-14 06:38:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 7333ae55321946ea09494047225dbdb2 SHA-1: e0eb49f6f8e066020c8be0dfc559de529c1bb576 SHA-256: 7097d5a816b3138d7697fc5fa03b54c98b39694b93171852235a7844e5be2616
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to compromised CMS upload directories, indicating a link farm designed to redirect users. ClamAV and ML classifiers flagged this as a phishing trojan. The presence of multiple external URIs and the 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic strongly suggest this document is part of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9929

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://www.scilights.com/wp-content/plugins/super-forms/uploads/php/files/8a05a566aa3d442eb9542dd864af45cf/tidedorebimajuzawanasire.pdf In PDF document text
    • https://smarttactic.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160b191e025389---97702927281.pdfIn PDF document text
    • https://armagedonspedycja.pl/files/file/88774144147.pdfIn PDF document text
    • https://www.dishdivvy.com/wp-content/plugins/super-forms/uploads/php/files/4384f2bd11bbf97d0b0e3feb12ecfaa0/71067014856.pdfIn PDF document text
    • https://volnynaklad.cz/data/file/33534535368.pdfIn PDF document text
    • https://perleyparish.org/wp-content/plugins/super-forms/uploads/php/files/b0932158527a45abf69a4ebd082a51e6/daxumirakujowaginezipa.pdfIn PDF document text
    • http://astro2sphere.com/admin/images/file/55990054088.pdfIn PDF document text
    • https://guapa2.com/admin/fck/file/18501982397.pdfIn PDF document text
    • http://www.drop-lok.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077411e67d7d---59353999585.pdfIn PDF document text
    • https://action-roofing.com/wp-content/plugins/super-forms/uploads/php/files/7bde1410d964f9f15a529ab5376b1ebe/24971753008.pdfIn PDF document text
    • https://www.vedaaz.com/wp-content/plugins/super-forms/uploads/php/files/a937a0602920170a1eb27c50538c7a06/56371267855.pdfIn PDF document text
    • https://mebelpozakazu.ru/wp-content/plugins/super-forms/uploads/php/files/7fc06a5dfb6ad63ef239b80f4e286eac/99497813641.pdfIn PDF document text
    • https://aksukartela.com/images_upload/files/1587388763.pdfIn PDF document text
    • https://mosoptagro.ru/wp-content/plugins/super-forms/uploads/php/files/2920e01cd0110545b8571ffec105f3b7/kazoj.pdfIn PDF document text
    • http://angelojrobles.com/admin_initial_test/userfiles/file/vakubitipajobamumelepu.pdfIn PDF document text
    • https://www.adler-leitishofen.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609cd859718ac---zopawefukafesegekika.pdfIn PDF document text
    • http://muskogeeroughers1967.com/clients/9/98/9899c641331876fb313f08ec475a0443/File/80766116539.pdfIn PDF document text
    • http://eduomania.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ec3f35de46---lakovukok.pdfIn PDF document text
    • https://3dreamstudios.com/wp-content/plugins/super-forms/uploads/php/files/f7778a1baedb8fbe9a73535aee346fcc/rawademugodasanezigakoraj.pdfIn PDF document text
    • http://cartolmania.it/file/lixadukomifijuxesipulifa.pdfIn PDF document text
    • https://comesa.com.pe/wp-content/plugins/super-forms/uploads/php/files/v0mcdcvifghr2n1j0gfj1e96o6/mutiwegotitasevupilok.pdfIn PDF document text
    • https://mimpishio1bet.com/contents//files/xuteb.pdfIn PDF document text
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/52s1tsedbcigpdd63kkojir651/nipevav.pdfIn PDF document text
    • https://troypin.com/calisma2/files/uploads/89272804033.pdfIn PDF document text
    • http://tizianaiberti.it/userfiles/files/22719619173.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=warfare+scriptures+against+the+enemyPDF 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_off00010938.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10938 17308 bytes
SHA-256: fd58ff557d2cfdd3ae21aa654c6c1599415d6dac473c598c46fb552ba18b9c18
font_01_sfnt_off0001363d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1363D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00014e54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14E54 10968 bytes
SHA-256: f905428e8d95b13dcade2a42fd260f6bb51cfadc493e20ac87daf4595978f4f3