Malicious PDF — malware analysis report

Static analysis result for SHA-256 f114e0afe25a0fdd…

MALICIOUS

PDF

77.4 KB Created: 2021-08-29 17:35:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 051232504bedeebe768f21260c49a618 SHA-1: 5413a5bd124c9e90ee240b1e26dff524a1c0a1f5 SHA-256: f114e0afe25a0fdd5009e690cb2dd855869cf333ddaa49b1e565f2fbde4d4ada
156 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs that point to compromised websites and disposable hosting, suggesting it functions as a link farm. The primary purpose appears to be directing users to potentially malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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=streaming+film+semi+young+mother PDF link annotation
    • http://www.elsecretodelolivo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bee5e338144---23138324172.pdfIn PDF document text
    • https://mgc.to/sites//web/upload/files/fuwodojilojedibiliwoku.pdfIn PDF document text
    • http://ibiforstarlight.org/clients/3/3c/3cfcca4e360ca8807b7dd7d6e7cbeae0/File/nilasofel.pdfIn PDF document text
    • https://chicagoportablexray.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608958d5dc97d---79665231675.pdfIn PDF document text
    • https://njsolarpower.com/wp-content/plugins/super-forms/uploads/php/files/c7bde16f52d626941176ce1f709dc614/nexakabowatekagu.pdfIn PDF document text
    • https://cafesca.org/ckfinder/userfiles/files/41631901228.pdfIn PDF document text
    • http://murasakijr.com/uploads/files/pomenu.pdfIn PDF document text
    • http://perfectthesale.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b173833f1df---bawixavolalim.pdfIn PDF document text
    • https://gotoko.com/cmsv2/upload/files/parafelelamatudipin.pdfIn PDF document text
    • http://gramercygrand.ru/files/file/5201222032.pdfIn PDF document text
    • http://tzoetemondje.be/uploads/files/mopezefapubozojika.pdfIn PDF document text
    • https://akproauto.com/nbloom/fckuploads/file/56951237458.pdfIn PDF document text
    • http://ackerviewguesthouse.com/userfiles/file/21871083754.pdfIn PDF document text
    • http://maility.pl/_ADRESuserfiles/file/28332062921.pdfIn PDF document text
    • https://dacoma.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160823ce05df66---50403586831.pdfIn PDF document text
    • http://christ-china.com/filespath/files/20210815172129.pdfIn PDF document text
    • http://influences-vegetales.eu/assets/Image//files/9413880318.pdfIn PDF document text
    • http://alexlunacoach.com/img/editor/file/sikozokoxelutinigib.pdfIn PDF document text
    • http://www.kigimex.com.vn/ckfinder/userfiles/files/61112391099.pdfIn PDF document text
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/6tt5lo4866k9akmhrvssmq2bt5/nikirolediwopinugavu.pdfIn PDF document text
    • https://mkting.com.co/wp-content/plugins/super-forms/uploads/php/files/7aa33ec520fe711de4d787f4e5d86d12/widen.pdfIn PDF document text
    • https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/34a05b09d7d1c9bade950bab4be05b03/28463582572.pdfIn PDF document text
    • http://stolizstekla.ru/userfiles/file/mifugarosafiko.pdfIn PDF document text
    • https://bilalyapidekorasyon.com/userfiles/file/butobig.pdfIn PDF document text
    • http://199.231.164.17In 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_off0000c722.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC722 18132 bytes
SHA-256: b156871f483f7b39d61e86f9e772ba62f7f84263933f1f42b83b4fa3992bde38
font_01_sfnt_off0000f5b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5B5 10952 bytes
SHA-256: 56f3401aea00c283f882860ac9ccaadb194d6e335107d5e27778b872cfc2f8dd
font_02_sfnt_off00010ef4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EF4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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