Malicious PDF — malware analysis report

Static analysis result for SHA-256 e434d287ffb07d08…

MALICIOUS

PDF

91.4 KB Created: 2021-07-29 10:05:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 6e7fbae948c53f76f4f3db90eef46c00 SHA-1: 60bfef4e9afaf134d5f01d0f84cea11ed368bb92 SHA-256: e434d287ffb07d08dea48387af230ee556675acc097381260f773c6d6636c4d8
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, containing numerous URLs that point to external resources, some of which are hosted on compromised CMS upload directories. The presence of multiple distinct hosts and the use of UTM parameters suggest an attempt to distribute malicious content or phish for information through a variety of lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9826

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://cottingham-group.com/cufiles/files/soxifu.pdf In PDF document text
    • https://nhahangbienhaitien.com/uploads/files/kuvovezasave.pdfIn PDF document text
    • https://lastcallslc.com/wp-content/plugins/super-forms/uploads/php/files/053861384566f9066dd640d08f4a19bf/buxedaw.pdfIn PDF document text
    • http://el-system.jp/uploads/2012/files/21353697679.pdfIn PDF document text
    • https://rozgarnetwork.com/ckfinder/userfiles/files/20787208053.pdfIn PDF document text
    • https://relans-nn.ru/images/docs/file/52245636372.pdfIn PDF document text
    • https://samiznojmo.cz/wp-content/plugins/super-forms/uploads/php/files/2953ce1a7064b328cb37b8c73f263d5c/jufomenox.pdfIn PDF document text
    • http://botosani.ro/img/uploads/file/pemenodugelotitifivalaz.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083036e1323d---leminotis.pdfIn PDF document text
    • http://raunlarose.us/wp-content/plugins/formcraft/file-upload/server/content/files/160761afb45a2b---84757415360.pdfIn PDF document text
    • http://www.agrosystem.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16088bdfa7aef8---zagexoxiva.pdfIn PDF document text
    • http://clinicaveterinariagoitese.it/userfiles/files/vexuzifutesosilikenijunu.pdfIn PDF document text
    • https://bursaceviritercume.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae0f8f3f6fb---figujilivafiguzoze.pdfIn PDF document text
    • https://perfecthospitals.com/ckfinder/userfiles/files/niforidi.pdfIn PDF document text
    • https://skyfireconsulting.com/wp-content/plugins/super-forms/uploads/php/files/qqhe54qsdg9ga1bsp8qlosg9hh/xuruxa.pdfIn PDF document text
    • http://www.caribbeandentist.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090b7ce4842e---35801898191.pdfIn PDF document text
    • http://webscape.co.bw/wp-content/plugins/formcraft/file-upload/server/content/files/1609f3d9cb10e9---pijowogogetutaz.pdfIn PDF document text
    • http://fitviewer.de/files/file/79027236835.pdfIn PDF document text
    • http://infinity-pro.ru/userfiles/file/duzukuwafemipaxoluzadig.pdfIn PDF document text
    • http://counterreaction.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607f79e03dcc5---52645547764.pdfIn PDF document text
    • https://playgametoday.ru/wp-content/plugins/super-forms/uploads/php/files/5881b03dff2930de1d94fd3b7e337102/18043679935.pdfIn PDF document text
    • http://commsoft.nu/demo/ktb/wsmbilder/files/nitovabe.pdfIn PDF document text
    • http://terapeutickemasaze.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16086b68427b2a---19739281047.pdfIn PDF document text
    • https://demircanticaret.com/userfiles/file/jugavalodezifedujivig.pdfIn PDF document text
    • http://primebrokeragetx.com/ckfinder/userfiles/files/8288062267.pdfIn PDF document text
    • https://aashianarealty.com/file/guzunixajolidivafeduf.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=coso+framework+2017+checklist+pdfPDF 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d99d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD99D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f1ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1AE 16416 bytes
SHA-256: a53189842a2c239d1eefc53d229ebe5a0322e18bd716236f3ed49f3077a8a441
font_02_sfnt_off0001087a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1087A 17956 bytes
SHA-256: cb0f0933edb60602484c0ced65f35afdd7ccafe9d51229d10c9847c98aab27b5
font_03_sfnt_off0001359f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1359F 11332 bytes
SHA-256: 57c6228d691becca5fcdd73b3d1e93cd51692396f42d9b9dddfce0677ac1bf75
font_04_sfnt_off0001507e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1507E 2532 bytes
SHA-256: ba2c824056e3dd6dfccdfa9bd3797ba6ae4e1937c98d5af380fb3374014fc5d6

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