Malicious PDF — malware analysis report

Static analysis result for SHA-256 0418bbb691a17364…

MALICIOUS

PDF

89.9 KB Created: 2021-07-13 01:23:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: e64ea9b131118c2613752c4e32f8f14b SHA-1: b08577ea8ba3045ce13ca8ff193db304e7c78336 SHA-256: 0418bbb691a173645d3bacf6466919c702c8fd76fd8bf6b0bc7dd317f223fa97
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised CMS upload directories, indicating a link farm designed to lead users to malicious content. ClamAV and ML classifiers confirm its malicious nature, specifically flagging it as phishing or a trojan. The presence of multiple distinct hosts and the use of 'utm_term' parameters suggest an attempt to distribute malicious links broadly.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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://robinio.de/wp-content/plugins/super-forms/uploads/php/files/lgh495u2h1f14gqta4e831avvs/50135562491.pdf In PDF document text
    • https://kodeac.com/wp-content/plugins/super-forms/uploads/php/files/q1h9rm0haiim8g6l0pncq588cn/82351158131.pdfIn PDF document text
    • http://www.nbrownies.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609ef34715fb4---11577779315.pdfIn PDF document text
    • http://www.molinoag.com/wp-content/plugins/formcraft/file-upload/server/content/files/160eca2ab7a3da---sutulevijivupejegi.pdfIn PDF document text
    • http://www.ncstarim.com.tr/wp-content/plugins/super-forms/uploads/php/files/i922al6m7f5pkjo3u0jdq2h691/43237022668.pdfIn PDF document text
    • http://www.restorationservice.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1609fe91a89711---bedobosaruxesi.pdfIn PDF document text
    • https://creationstationdance.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081f813955ea---85608890859.pdfIn PDF document text
    • http://beachfirebrands.com/userfiles/file/woloxusuwolivixodi.pdfIn PDF document text
    • https://weinquartier.at/wp-content/plugins/super-forms/uploads/php/files/9fa76a86ec65c0c886c302b292fa99a3/49745191647.pdfIn PDF document text
    • http://blevy.com/ckfinder/userfiles/files/98131659262.pdfIn PDF document text
    • http://bellezaeimagen.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1607cc8e6bad1d---zomabozutegujesedeso.pdfIn PDF document text
    • http://kasystemofkarate.com/clients/861259/File/78513328343.pdfIn PDF document text
    • http://krindustria.com.br/site/wp-content/plugins/formcraft/file-upload/server/content/files/160a0fbfaa3058---80624370732.pdfIn PDF document text
    • http://chalappuram.com/userfiles/file/65261787282.pdfIn PDF document text
    • http://barrarioservicos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608910d36cb5a---99488005393.pdfIn PDF document text
    • http://xn--80aantfcaehjbxzf1m.xn--p1ai/userfiles/file/72850363084.pdfIn PDF document text
    • https://www.growxponential.com/wp-content/plugins/super-forms/uploads/php/files/l6vsl4fj13hi3qar9rbspgds87/fapukuxisapibuwumaturaxi.pdfIn PDF document text
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/7l0nodr3a2vsdcat3s1in0l4lu/tikuv.pdfIn PDF document text
    • https://www.kiteschule-kiel.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607576bdf01e0---kalimugomiko.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/160bb842ad29cc---sobibuni.pdfIn PDF document text
    • http://praguetransfer.com/files/file/fikepanuverogato.pdfIn PDF document text
    • https://koncnc.com/genelresimler/file/gekikezofalonotok.pdfIn PDF document text
    • https://ketgate.eu/wp-content/plugins/super-forms/uploads/php/files/3bf9ff30c789fbca8e309c7d37d21932/mamipujagunos.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=poems+about+happinessPDF 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_off0000fd3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD3C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001154e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1154E 17340 bytes
SHA-256: ed5e5ea40b9e15096ca4946e009f51e71ecfefa07a59ad0ad0a37cbf15088398
font_02_sfnt_off000142be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x142BE 10612 bytes
SHA-256: 94e48088ee3fefb7f196f3c99a2d714c201c4b0e7a17606ba8494f7ba6f93b7d

Open this report in the interactive analyzer, or submit your own file for analysis.