Malicious PDF — malware analysis report

Static analysis result for SHA-256 14d2dd9b71d4ec61…

MALICIOUS

PDF

72.2 KB Created: 2021-06-27 06:46:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 89fe4bbf8f72a623ca959b83d7c8feb2 SHA-1: fb5c1b54182570721588e977fc187556d44821bc SHA-256: 14d2dd9b71d4ec611b2c48c628b57ada13198fae5f2f30fec734cfdaf4eab65f
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, containing numerous URLs pointing to compromised CMS upload directories, suggesting it's used to distribute further malicious content or lead users to phishing sites. The presence of multiple links on disposable hosting and the use of UTM parameters further support its role as a malicious redirection tool.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab5ba402cdc---14525741149.pdf
    • http://alliance-ltd.com/userfiles/wibop.pdf
    • https://njsolarpower.com/wp-content/plugins/super-forms/uploads/php/files/84c2e0833d91c56e1a86555a4f1f7ae7/bakusuwimikovudopezekir.pdf
    • https://amenagementsoleil.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609141f4a83dd---16500311713.pdf
    • http://aksaaydinlatma.com/img/editor/image/file/sewololisurabefupo.pdf
    • http://penzionklara.cz/userfiles/file/7255632381.pdf
    • http://www.vitrierbxl.be/wp-content/plugins/formcraft/file-upload/server/content/files/1608f71c44c202---xaperi.pdf
    • http://talleresjpg.es/img/file/6524961079.pdf
    • https://www.elementstraining.co.uk/wp-content/plugins/super-forms/uploads/php/files/su4n83tanndp1onub0qj9tceme/fofes.pdf
    • https://tavio.ru/files/file/2856351474.pdf
    • https://www.numberoneporthill.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1608f6d46115c7---kapavekejivekal.pdf
    • http://viaterrestre.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16097091ede6c9---zomililiv.pdf
    • https://fourseasons.events/wp-content/plugins/super-forms/uploads/php/files/98723f0164c8bbbada714d7fd2df15bb/76853278963.pdf
    • https://www.medipratik.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e049fe4ec3---putavifomezuwetofexod.pdf
    • http://re-view.online/fckFiles/file/54475805761.pdf
    • http://rocincorporated.com/domain.com/images/dynamic_pages/file/nafabir.pdf
    • http://topas.lt/userfiles/file/33480432118.pdf
    • https://matskaren.se/anvandarbilder/203/files/16810313818.pdf
    • https://www.sblending.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160c0f157484a8---xasogebosik.pdf
    • http://braciszewska-klimek.pl/fck_files/file/bezetatetijolivutuxaj.pdf
    • http://abogarestudio.com/userfiles/file/demurama.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=left+right+meaning
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bbfa.bin
0b025c3656956207c83002a1273838c34bfb76e5596db562b47fba0904268885
pdf-font-stream PDF embedded font (sfnt) at offset 0xBBFA 16128 bytes
font_01_sfnt_off0000e51e.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE51E 16792 bytes
font_02_sfnt_off0000fd35.bin
47f9158c408ef9b2e1ddb501016536c1bdc96c8a3fbe59e9c4f5c4aa9a1dc409
pdf-font-stream PDF embedded font (sfnt) at offset 0xFD35 10284 bytes