Malicious PDF — malware analysis report

Static analysis result for SHA-256 0dfd7d5dc001188f…

MALICIOUS

PDF

83.6 KB Created: 2021-09-01 12:17:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 3959b0ed9578b9f5165d2cad5aaa0539 SHA-1: 3149a38979b8dba3f53b2727d20f6f94c8e259f6 SHA-256: 0dfd7d5dc001188fe5a7a7eb0eb337cbe83b5a7b042a5bed159ecc6ae6dde941
156 Risk Score

Malware Insights

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

The sample is identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, with numerous URLs pointing to compromised CMS uploads and disposable hosting, suggesting an attempt to redirect users to malicious sites. The presence of external URIs and link farm characteristics strongly supports a phishing or malware distribution attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://synerhu.ru/uplcv?utm_term=barry+goldwater+president PDF link annotation
    • http://www.sbawerribee.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160ba43e2dfa40---panigewasegaxujon.pdfIn PDF document text
    • https://www.novet.de/wp-content/plugins/formcraft/file-upload/server/content/files/16125d37f5f1b8---putazoravizimomozi.pdfIn PDF document text
    • https://www.scilights.com/wp-content/plugins/super-forms/uploads/php/files/54ae3061e58b37c5af5959f7bab03868/davapuzejamoba.pdfIn PDF document text
    • http://hzjksj.com/images/upload/File/74147868138.pdfIn PDF document text
    • http://teplorium.su/userfiles/file/zanepuzimeza.pdfIn PDF document text
    • https://portalbime.com/UploadedFiles/New/file/bodizanurovuxiwotudogadij.pdfIn PDF document text
    • http://vizugy.hu/uploads/files/38088912880.pdfIn PDF document text
    • https://uaqbakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160870cdb0f461---kazutenilunopuvoremiki.pdfIn PDF document text
    • http://verkoop-je-wagen.be/wp-content/plugins/formcraft/file-upload/server/content/files/160a81ced2e7ca---fetopujutusekaxijek.pdfIn PDF document text
    • http://uat.ideadunes.com/projects/ideadunes-portfolio-site/wp-content/plugins/formcraft/file-upload/server/content/files/16089d21403021---85054818837.pdfIn PDF document text
    • https://activsport.ro/userfiles/file/pitobijijimulezov.pdfIn PDF document text
    • http://www.assignproject.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f21e3a418d---63969438149.pdfIn PDF document text
    • http://www.northeastmarquees.com/wp-content/plugins/super-forms/uploads/php/files/bed27ab330625e8be02a39592c24377b/vulixigokiwopojula.pdfIn PDF document text
    • http://bk-plus.at/userfiles/files/72831442435.pdfIn PDF document text
    • http://www.iamgoingto1996.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084750ec275b---femizorejugimetewi.pdfIn PDF document text
    • http://101eyewear.com/luutru/files/63031936498.pdfIn PDF document text
    • https://topinsolventa.ro/userfiles/file/belofuzosowopewenor.pdfIn PDF document text
    • https://www.visitrwanda.com/wp-content/plugins/super-forms/uploads/php/files/d27020a8b1ccd75aaa1cb03ed19d2d9c/tipedamelubikadosobi.pdfIn PDF document text
    • https://www.sudburyhighspeedinternet.ca/wp-content/plugins/super-forms/uploads/php/files/0908249f2c7ac01c7db93aec1ab4a36e/20292324871.pdfIn PDF document text
    • http://flexa.cz/docs/file/fovenetigorof.pdfIn PDF document text
    • https://bharatiyabhashaparishad.org/ckfinder/userfiles/files/xafemevadekizulerezokat.pdfIn PDF document text
    • https://gtselect.fr/ckfinder/userfiles/files/79726751163.pdfIn PDF document text
    • https://chiataiec.com/userfiles/Proj_Name//files/mominekewubawimenub.pdfIn PDF document text
    • 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_off0000e034.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE034 17968 bytes
SHA-256: f0f48caf631912c459fed38390459ab146c4a2880e128312cf23f95649a691f5
font_01_sfnt_off00010ea5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EA5 10820 bytes
SHA-256: e78d3479e22fa18ce622f5c97a34d0376de8f3ce3eb3c243339cdfbe1959edd1
font_02_sfnt_off00012798.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12798 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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