Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d6e691eb81fd739…

MALICIOUS

PDF

87.1 KB Created: 2021-07-18 21:46:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: b71f92cc379b30b39bc9c865479718a2 SHA-1: 96448aa1ade254b68d22cb5403241914febabea4 SHA-256: 6d6e691eb81fd739c80006ec8927de02944138ba1cd449c4a69ae57de5e7d112
176 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains a link farm pointing to multiple domains, some of which are associated with compromised CMS uploads or disposable hosting, suggesting a phishing or malware distribution campaign. The 'SE_CALLBACK_LURE' heuristic further supports a phishing pretext, likely aiming to trick users into interacting with malicious links or content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

Heuristics 7

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://gemwishrs.com/ckfinder/stones/files/64808782971.pdf In PDF document text
    • http://superplasticizer.cn/d/files/dizuka.pdfIn PDF document text
    • https://workinhotel.com/upload/fckfile/jotubelorikuvubinoro.pdfIn PDF document text
    • https://landlorddebtadvisory.com/wp-content/plugins/super-forms/uploads/php/files/4q5tfqp6tk1k2l9b2p1d43i7u3/26310612449.pdfIn PDF document text
    • https://www.diktu.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b77c7d1c815---48748951196.pdfIn PDF document text
    • http://topopentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076b0a77c3e7---43871983435.pdfIn PDF document text
    • https://nhaban24h.com.vn/wp-content/plugins/super-forms/uploads/php/files/majmj1q6itomgffr797eas4kdm/madewijinigusopuxo.pdfIn PDF document text
    • https://1877painters.com/FCKeditor/file/57168898982.pdfIn PDF document text
    • http://dzbnf.com/upload/file///muwexum.pdfIn PDF document text
    • https://fiscalonline.eu/app/webroot/files/userfiles/files/73928229341.pdfIn PDF document text
    • https://kompaspt1.com/contents//files/18829513842.pdfIn PDF document text
    • https://oddluzanie.net/userfiles/file/kiwizigonude.pdfIn PDF document text
    • http://abwpetersburg.com/uploads/files/46784308441.pdfIn PDF document text
    • http://chicagohalo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ae80235d95---gujez.pdfIn PDF document text
    • http://essiac.cz/UserFiles/file/92732642349.pdfIn PDF document text
    • https://michaels-limo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085064263382---furosapiguxesa.pdfIn PDF document text
    • http://serramentisiciliano.it/userfiles/files/11327646336.pdfIn PDF document text
    • http://xn----8sbpvg0afdbe.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/4f30d4rgp4kg1qtjvfbtoqaid2/20997877018.pdfIn PDF document text
    • https://www.hungarianassociation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c85840c250---divatase.pdfIn PDF document text
    • https://directprocessors.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c2f2b57d4d7---xikizimejowese.pdfIn PDF document text
    • https://amatnieks.com/pictures/image/59973228747.pdfIn PDF document text
    • http://ketoanaca.com/uploads/image/files/4790083492.pdfIn PDF document text
    • http://charivne.info/images/file/69648889948.pdfIn PDF document text
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc5dba9fb3---gikat.pdfIn PDF document text
    • http://heilpraxis-pankow.de/wp-content/plugins/formcraft/file-upload/server/content/files/16074c0bc12fbe---51172787711.pdfIn PDF document text
    • http://penoplex24.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160cc34c1de02f---nudozumejemuzikuvi.pdfIn PDF document text
    • http://for-rent-leuven.com/wp-content/plugins/formcraft/file-upload/server/content/files/160badc73dfbc3---vipulaz.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=eastern+rosella+for+sale+near+mePDF 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_off0000f3fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3FB 16812 bytes
SHA-256: 781e0d7c37d1b4acd2efa465c324cba01ea732f1b9d6bfbc1378891527898089
font_01_sfnt_off00011fa9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FA9 10264 bytes
SHA-256: a0c7bd2b87d9432728348ec63fba065e182321971ad9454671d6217e29c506f6
font_02_sfnt_off000136c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x136C1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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