Malicious PDF — malware analysis report

Static analysis result for SHA-256 f1602245594b267b…

MALICIOUS

PDF

83.3 KB Created: 2021-09-07 05:13:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: f75685617203abcdad074bd1ef970611 SHA-1: 8dee4949f09655e1bc2ec296ef639fb4eba82b59 SHA-256: f1602245594b267b241b7743ec1fd35b639797b46952cfbe3131a08236816310
156 Risk Score

Malware Insights

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

This PDF was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. It contains numerous links, many pointing to WordPress sites with compromised upload storage, suggesting a link farm designed to redirect users to malicious content. The presence of external URIs and link farms indicates an attempt to lead users to potentially harmful destinations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://yossy.biz/userfiles/file/gerikojavezogiminupez.pdf In PDF document text
    • https://www.tai.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160bba338ea80e---nogadejuletovuwerakoguv.pdfIn PDF document text
    • https://amenagementsoleil.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606dfd9d44cb9---kafijeno.pdfIn PDF document text
    • http://banglenhospital.com/UserFiles/File/rewifixafilupelejuxemo.pdfIn PDF document text
    • http://qbcar.ru/ckfinder/userfiles/files/53432859848.pdfIn PDF document text
    • https://cowichanseniors.ca/userfiles/file/44754160673.pdfIn PDF document text
    • http://ambulatorioveterinariocamali.com/userfiles/files/xabuwa.pdfIn PDF document text
    • http://www.uvhk.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b18ea21b6d0---40364763700.pdfIn PDF document text
    • http://twilaw.com/files/files/durunizewilupu.pdfIn PDF document text
    • https://cvenhancer.com/wp-content/plugins/super-forms/uploads/php/files/38d0ba08271e0eb11d288c84151461f5/72812904897.pdfIn PDF document text
    • https://www.alongsideasia.com/wp-content/plugins/super-forms/uploads/php/files/09f31d7ee09bb7598c108a659a37f69c/85299209472.pdfIn PDF document text
    • http://www.communityheroesproject.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608f411f1a6bc---11994324816.pdfIn PDF document text
    • https://miamivanservice.net/wp-content/plugins/formcraft/file-upload/server/content/files/16077ba27931cb---bekitoruxekadoxerupex.pdfIn PDF document text
    • https://www.physioaktivkramer.de/wp-content/plugins/formcraft/file-upload/server/content/files/16097c43f18cdd---buvizotud.pdfIn PDF document text
    • https://equinox-e.com/upload/UserFiles/file/89139653359.pdfIn PDF document text
    • https://spitalmoldovanoua.ro/ckfinder/userfiles/files/munigawo.pdfIn PDF document text
    • https://globaldreamindia.com/webcms/file/68904693436.pdfIn PDF document text
    • http://www.bestlifepolicy.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16080dc0c96903---pujezasamazinog.pdfIn PDF document text
    • http://bridgesonthepark.com/wp-content/plugins/formcraft/file-upload/server/content/files/16131b1925de1d---14211825080.pdfIn PDF document text
    • http://tcsm62.org/uploads/news/file/58382127870.pdfIn PDF document text
    • http://cetinelektrik.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16118dcf8d39fb---nutumo.pdfIn PDF document text
    • http://studioego.cz/userfiles/file/xeridis.pdfIn PDF document text
    • https://yapluka-services.fr/userfiles/file/35963213209.pdfIn PDF document text
    • https://miet.hu/kepek/4849287576.pdfIn PDF document text
    • https://adiwirawanbali.com/wp-content/plugins/super-forms/uploads/php/files/32961ba2fe5893005215e2682cb28593/73518270588.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=grammar+worksheet+present+simple+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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e01c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE01C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f833.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF833 10980 bytes
SHA-256: 200de1a1bb2c67f91c76de2b3479f2491c9336e09c9f7e2f2f9b38d23d31c268
font_02_sfnt_off00011191.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11191 17776 bytes
SHA-256: 40757693da84a8aa45b0d27f0f9269845c79bb0e9c0bdbbed359ff3259263c6f

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