Malicious PDF — malware analysis report

Static analysis result for SHA-256 9eda0d5216bcc5a0…

MALICIOUS

PDF

88.6 KB Created: 2021-09-08 14:20:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: c3c9e98dd4730e5538d1ae0db5f9bec2 SHA-1: a89f39d2958755ec30b4c739a54d933a753b652b SHA-256: 9eda0d5216bcc5a00e51742aea5325c85676f0cec2024a4b470021a911f2edb6
156 Risk Score

Malware Insights

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

The PDF was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm, with multiple URLs pointing to compromised CMS uploads and disposable hosting, suggesting an attempt to distribute malicious content or phish users. The document body is heavily obfuscated and contains no readable text, further supporting the malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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 http://ogledalata.bg/uploads/pages/files/40758842696.pdf
    • http://wwpokebar.com/uploads/files/7570165250.pdf
    • https://sf-tfi-pgu.uz/wp-content/plugins/super-forms/uploads/php/files/50ed8d2cf9a1a567903584329e95b611/79545269993.pdf
    • http://sunmoon-glory.com/web/upload/files/62014675047.pdf
    • http://attep.com/home/sandbox/domains/heekee.com.hk/public_html/ckfinder/userfiles/files/watifazezilugutejafakiped.pdf
    • http://ventima.ru/userfiles/file/54856212873.pdf
    • http://pastoret.it/userfiles/files/xidufebakijazevade.pdf
    • https://www.coconutlodge.com/wp-content/plugins/formcraft/file-upload/server/content/files/161315f9058498---28042456328.pdf
    • http://siripanyalamphun.com/user_img/files/34197533037.pdf
    • https://study-abroad-travel.com/ckfinder/userfiles/file/vemetemugifuraxafuluguxu.pdf
    • https://solener.info/ckfinder/userfiles/files/loxikomavabevuxarivijos.pdf
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16134303d8a92d---regilamopujekefikobepib.pdf
    • http://www.mearesandassociatesllc.com/siteuploads/editorimg/file/lilavolevezezadamizi.pdf
    • https://lokmangal.co.in/wp-content/plugins/super-forms/uploads/php/files/99c130e8492648db5ca9f170a78bf05e/99966720747.pdf
    • https://malashealthcare.com/userfiles/files/delusir.pdf
    • http://cpviettin.com/upload/files/jozup.pdf
    • http://twsl.mingann.info/upload/ckfinder_temp/files/20210904090544.pdf
    • https://big-affaires.com/img/pics/files/42296230227.pdf
    • http://gps-tw.com/CKEdit/upload/files/dosawob.pdf
    • https://holcom-wd.holcom.vn/webroot/img/files/51570144014.pdf
    • http://cokhilegia.com/upload/files/doluwunafi.pdf
    • http://upservice.expert/admin/ckfinder/userfiles/files/betozoresikedafeveg.pdf
    • https://ukmriptek.org/codeIgniter-hmvc/userfiles/files/vojuzikiwowafokomu.pdf
    • https://cutletsmeat.com/wp-content/plugins/formcraft/file-upload/server/content/files/16132109fd8a29---kupinapexuwutitidox.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=christianity+today+magazine+pdf
    • https://unimedbelem.com.br/painel_template/assets/global/plugins/ckfinder/userfilesfiles/68631292296.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f343.bin
94b50f461628d7bfe49e8f5f7852559d59263aeec38b5f7113d9c8d0c7f155d8
pdf-font-stream PDF embedded font (sfnt) at offset 0xF343 11104 bytes
font_01_sfnt_off00010cde.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x10CDE 16792 bytes
font_02_sfnt_off000124f0.bin
2404cd068cabed7ed16645420ac725b2701efc8f5f1c479c46a23a711a607f5e
pdf-font-stream PDF embedded font (sfnt) at offset 0x124F0 18188 bytes