Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6abd90b94ef3b80…

MALICIOUS

PDF

84.5 KB Created: 2021-09-15 14:46:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 801ceac8eb4860a122054cd6ccfc1e8c SHA-1: aacde6bb7af8aedadb89d7f2f8d86ce96857b249 SHA-256: e6abd90b94ef3b80259689a60a287d54cac6429dcbc44de0ecbb87e568c3d6d8
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised CMS uploads or disposable hosting, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery.

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 https://medvor.ru/uplcv?utm_term=watch+bringing+down+the+house+online+free PDF link annotation
    • https://dpengineerindia.com/admin/userfiles/file/juveseko.pdfIn PDF document text
    • http://cgpharma.in/cote_dor_import/admin/ckfinder/userfiles/files/89650730838.pdfIn PDF document text
    • https://groupburuemas1.com/contents/files/29009081026.pdfIn PDF document text
    • http://vce34.ru/attachments/file/33063159145.pdfIn PDF document text
    • http://briztravel.com/upload/files/rabuvafavulomiko.pdfIn PDF document text
    • http://westhollywood.ilovepokebar.com/uploads/files/76804673187.pdfIn PDF document text
    • http://longarmacademy.net/fckeditor/userfiles/file/kunanadaridonibapuburin.pdfIn PDF document text
    • http://letnipohar.cz/upload/file/42756110107.pdfIn PDF document text
    • https://bestmiamiturf.com/wp-content/plugins/super-forms/uploads/php/files/d065a88f8106898aec9a25ca1a9a1c9b/molipamowug.pdfIn PDF document text
    • https://nocenzura.space/web/img/podborky/files/79911010419.pdfIn PDF document text
    • https://stpeterscbs.ca/ckfinder/userfiles/files/womoduzepedasofikinipenax.pdfIn PDF document text
    • https://nhatngudongkinh.phapluatvietnam.com/upload/ckupload/files/86812763739.pdfIn PDF document text
    • http://rockycheng.com/ckfinder/userfiles/files/23117715600.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/161366284c39b6---nesivimulesenosodaburidek.pdfIn PDF document text
    • https://drhuanghair.com/uploads/files/202109030255432334.pdfIn PDF document text
    • https://pelicanfinancialnetwork.com/ckfinder/userfiles/files/97766059744.pdfIn PDF document text
    • https://ekselantechnology.solutions/ckfinder/userfiles/files/pisalanurovirawava.pdfIn PDF document text
    • https://svenjakretschmer.com/ckfinder/userfiles/files/86246197859.pdfIn PDF document text
    • http://www.nbrownies.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1614139717ff30---94093385744.pdfIn PDF document text
    • http://jagodkaprzedszkole.pl/userfiles/file/zirulijekubosiduxeg.pdfIn PDF document text
    • https://www.ogblfrontaliers.fr/wp-content/plugins/super-forms/uploads/php/files/043h9bnjae4kh333tgj4n1j9v2/3838185876.pdfIn PDF document text
    • https://thehouseproduction.net/file/68324236006.pdfIn PDF document text
    • https://apexsafetyproducts.com/ckfinder/userfiles/files/xejosup.pdfIn PDF document text
    • http://www.ncstarim.com.tr/wp-content/plugins/super-forms/uploads/php/files/h1kd25rv442uabvn78nbtbldp2/puzofojofijipuzafuges.pdfIn PDF document text
    • http://bkm-market.net/userfiles/file/pudafanowarovikisi.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_off0000e3c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3C9 11076 bytes
SHA-256: 961462e2966d512fedbb715616fac231e62b6e274aad720fd318c8fcc5f69764
font_01_sfnt_off0000fd67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD67 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011579.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11579 17744 bytes
SHA-256: 9a631abcb37d6aef21d024cc240d1a48e955a73402adb0e9e0e91bb81864f8be