Malicious PDF — malware analysis report

Static analysis result for SHA-256 30c9db2e9ac89300…

MALICIOUS

PDF

84.3 KB Created: 2021-07-01 19:35:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: ba65b4012df247c4c05635760662746d SHA-1: 9b6313bd86bf3c6faac77b336e2b3db71160927a SHA-256: 30c9db2e9ac893000380b3270bda78943a05e902b5a01f70e1532ae7b66c1cee
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

This PDF file was flagged by multiple heuristics as a link farm, with many distinct hosts and links, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly support its malicious nature. Although no scripts were explicitly extracted, the PDF structure and numerous embedded URLs suggest it is designed to redirect users to potentially compromised websites, likely for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9860

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://industrialdevices.in/uploads/99791982322.pdf In PDF document text
    • https://carea2plus.com/wp-content/plugins/super-forms/uploads/php/files/b2879db0c546ee7ed985f56ab7125549/50203056184.pdfIn PDF document text
    • https://www.andimoda.com/wp-content/plugins/super-forms/uploads/php/files/37c88e4f7941c89a8a7a806ee8b519dd/lutegotesede.pdfIn PDF document text
    • http://www.advancedevents.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16086068078f95---giniget.pdfIn PDF document text
    • https://bluetact.com/locktactyuma/userfiles/file/borepavakofiv.pdfIn PDF document text
    • https://pfgmm.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1609cf33b0b32c---86503122509.pdfIn PDF document text
    • https://dhcom.vn/userfiles/file/90104140066.pdfIn PDF document text
    • http://pnmanagementsolutions.in/uploads/27755842666.pdfIn PDF document text
    • https://cruiseship.cruises/wp-content/plugins/super-forms/uploads/php/files/eshighvk71kghucp7gj4phqo72/62899015721.pdfIn PDF document text
    • https://travels-ukraine.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c0ab97a7c0c---xoselatenep.pdfIn PDF document text
    • http://esthebel.de/userfiles/file/95447913041.pdfIn PDF document text
    • http://tverzhilservis.ru/foktver.ru/ckfinder/userfiles/files/56195230137.pdfIn PDF document text
    • https://ladychief.com/wp-content/plugins/super-forms/uploads/php/files/2ca607d875e18b8feef433a33ae454f8/88660934251.pdfIn PDF document text
    • http://allasclub.com/campannas/file/minepapotudefaxapinule.pdfIn PDF document text
    • https://kermoulin.com/userfiles/file/xazupu.pdfIn PDF document text
    • http://bestbuyfromindia.com/userfiles/file/799836832.pdfIn PDF document text
    • http://suportti.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c282325e1d---disajapixarabirovifaxuw.pdfIn PDF document text
    • http://fcv-bo.org/data/fcv-bo/userfiles/file/38480874223.pdfIn PDF document text
    • https://weinquartier.at/wp-content/plugins/super-forms/uploads/php/files/b183d360ac262b43941c8602b7b2247b/85768841409.pdfIn PDF document text
    • http://apexibd.com/uploads/fck_uploads/file/66376233081.pdfIn PDF document text
    • https://bnbcostaverde.it/userfiles/file/34826042197.pdfIn PDF document text
    • https://www.revistadefiesta.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c517f703ef9---xapuramajijixage.pdfIn PDF document text
    • https://ecef-groupe.com/wp-content/plugins/super-forms/uploads/php/files/a0gmu12an40ois40271ht0k9m2/temekedagusafuxulepegu.pdfIn PDF document text
    • http://bridgesonthepark.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b97e4186d92---26530161895.pdfIn PDF document text
    • http://peaceinsrilanka.lk/userfiles/file/moditokegaden.pdfIn PDF document text
    • http://sfera-vlad.ru/img/file/zeliraxuxufegutalenuvuwa.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=muskies+on+the+shieldPDF 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_off0000e584.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE584 10268 bytes
SHA-256: 94b46f2c3ccf05be4e790bd7b8cb0cfbaddf7f11deab89ec47c0d9e09bf69282
font_01_sfnt_off0000fc89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC89 17408 bytes
SHA-256: 899ec203f3ca6177ebf1a19e67200405139086690d2b55749a32bbd2ca4147b2
font_02_sfnt_off00012a4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A4E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1