Malicious PDF — malware analysis report

Static analysis result for SHA-256 4aed14fb3a3abf4a…

MALICIOUS

PDF

95.1 KB Created: 2021-09-03 02:48:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 64c450598d304ec0991b9b1d02ec19db SHA-1: f219d2193424f611424577988ffa2f410835eb41 SHA-256: 4aed14fb3a3abf4a85d05f0055c76e3d7bac4d96d504d699a89567ddb5910e27
156 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Numerous URLs were extracted, many pointing to compromised CMS upload storage or disposable hosting, suggesting a link farm designed to redirect users to phishing or malware sites. The PDF structure and embedded URLs align with common phishing tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://queure.ru/uplcv?utm_term=deep+learning+textbook+pdf PDF link annotation
    • http://myblindz.com/fck_user_files/file/savefimozatu.pdfIn PDF document text
    • https://poolpoint.be/uploads/file/38553641488.pdfIn PDF document text
    • https://rebates.forex/wp-content/plugins/super-forms/uploads/php/files/v4sem4cpbs19od7q61eje2rju2/torim.pdfIn PDF document text
    • http://hoanhaochemical.com/uploads/files/fimusuwusumowipofuronew.pdfIn PDF document text
    • http://fbchitchcock.org/clients/8/8b/8bdff38a390027835eb24981312b950c/File/watogitizukinarebuzamu.pdfIn PDF document text
    • http://mesotects.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aecccb97c0a---tevokoguvobe.pdfIn PDF document text
    • http://architettosirocco.it/userfiles/files/65597734175.pdfIn PDF document text
    • http://abwnickersonplaza.com/uploads/files/mamok.pdfIn PDF document text
    • https://ecobox.eng.br/wp-content/plugins/super-forms/uploads/php/files/e325cs1e4sumbaok2am6686uvd/doxaxokev.pdfIn PDF document text
    • http://championshipsportsrings.com/clients/23492/File/2937740143.pdfIn PDF document text
    • https://www.olympusnorge.no/wp-content/plugins/super-forms/uploads/php/files/e0uda2cn6046f2ce1dbjk44tut/kolizabibobuduvozaju.pdfIn PDF document text
    • http://cowmoo.org/ckfinder/userfiles/files/wowigukivabulozoj.pdfIn PDF document text
    • https://anzmrrn.org/wp-content/plugins/formcraft/file-upload/server/content/files/1606e6477c293e---vomutabolutobipa.pdfIn PDF document text
    • http://trainternational.in/wp-content/plugins/formcraft/file-upload/server/content/files/160b2ff8983887---potimifevu.pdfIn PDF document text
    • http://le-bouquet.be/userfiles/files/sezewadegisevuguziginipi.pdfIn PDF document text
    • https://samowar.ch/upload/file/zidoxulozevigodo.pdfIn PDF document text
    • http://www.opencalgary.org/wp-content/plugins/formcraft/file-upload/server/content/files/16072aa4eb217e---74473421532.pdfIn PDF document text
    • https://ewdel.cz/ckfinder/userfiles/files/kovupukativewazalerorig.pdfIn PDF document text
    • http://hanart21.com/files/userfiles/file/85900832291.pdfIn PDF document text
    • http://www.tobywells.org/media/fckdir/file/46928602737.pdfIn PDF document text
    • http://viermaalh.nl/Bottesteyn/Site/afbeeldingen/file/13203155930.pdfIn PDF document text
    • http://citadelcaralarms.com/userfiles/file/livezos.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_off000104a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104A2 21824 bytes
SHA-256: d431241b362e63b4a3a1b32041d58ebc66befd00e122a262e3f45ed8a714b6da
font_01_sfnt_off00013e29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13E29 10840 bytes
SHA-256: d36980bf50f06d0d5395becd0018d557944d8eb3072efb222fbbb9f3b3348310
font_02_sfnt_off000156de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x156DE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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