Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b645b474577a99d…

MALICIOUS

PDF

98.8 KB Created: 2021-06-28 07:44:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 0eee95fbb654e1da4ef562ee46ca89c7 SHA-1: 0dd93350880d93ad8c26d6697cc19d3f9f0e62fa SHA-256: 6b645b474577a99d684c9429feb52d707088786a61ad6a7b84c83940e670d2a6
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It functions as a link farm, containing numerous URLs pointing to potentially compromised websites, including those using formcraft plugins for file uploads. The presence of these links suggests an attempt to lure users to external resources, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://msci.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/160b9d98100e28---dazopibowekojumajozukamap.pdf In PDF document text
    • https://too.kg/wp-content/plugins/super-forms/uploads/php/files/4b72992d20a06ff7726df855622d81be/wijaguvajepuribaruxere.pdfIn PDF document text
    • http://africa-emergence2019.com/userfiles/file/35458782579.pdfIn PDF document text
    • http://innospectrum.eu/hirlevel/file/zedubozisurag.pdfIn PDF document text
    • https://codecs.ro/images/file/28477540226.pdfIn PDF document text
    • https://299-45.com/CKEdit/upload/files/32448458205.pdfIn PDF document text
    • https://israelonthehouse.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b88d8465b49---terazuxixum.pdfIn PDF document text
    • https://karinbentum.nl/uploads/file/nibibusoxi.pdfIn PDF document text
    • http://accessiblevehicleservices.com/userfiles/file/bixodigekitamafob.pdfIn PDF document text
    • http://studiolegalezullo.eu/userfiles/files/mukejelevimusotife.pdfIn PDF document text
    • https://naseeha.org/wp-content/plugins/super-forms/uploads/php/files/e5182e820077298b5de18965008ecf6b/21754577223.pdfIn PDF document text
    • https://lukili.ch/UserFiles/files/zetepawiferirojoril.pdfIn PDF document text
    • https://www.frankcapassoandsons.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b7c9a6c7bdd---50972994021.pdfIn PDF document text
    • http://pavcargo.ru/wp-content/plugins/super-forms/uploads/php/files/2fd35475034409d39590951408f9f550/23327165688.pdfIn PDF document text
    • http://www.ausafrica.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160869d06d7502---28612977263.pdfIn PDF document text
    • http://lateonsettay-sachs.org/userfiles/file/kejegajirizoletixet.pdfIn PDF document text
    • https://alcc.vn/wp-content/plugins/super-forms/uploads/php/files/u9k9jh278vbgn96t0mlt68h3lu/97297865951.pdfIn PDF document text
    • http://drvision.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a919ee95961---38538178266.pdfIn PDF document text
    • https://www.18fire.com/wp-content/plugins/super-forms/uploads/php/files/f57600ecb8c05b4ccd440b8d315b48a6/35984559759.pdfIn PDF document text
    • https://senzedigicraft.com/wp-content/plugins/super-forms/uploads/php/files/8470db64d22617790a8df34f52ac9ce9/97254626988.pdfIn PDF document text
    • https://tfnd.org/wp-content/plugins/super-forms/uploads/php/files/b275b6868092c40ed5468399e58f6892/88134418786.pdfIn PDF document text
    • http://ghalemdi.com/userfiles/file/vixil.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=truth+and+truth+questionsPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012080.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12080 17680 bytes
SHA-256: cb31ce6d1d7644cceeb0b58c154c78c919c83ced440e2d27caf8a85032afa545
font_01_sfnt_off00014e65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14E65 10508 bytes
SHA-256: 887da6e38953d41f186bc2173dd0c9f68408297822e4072433c65acfc9979eaf
font_02_sfnt_off0001660d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1660D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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