Malicious PDF — malware analysis report

Static analysis result for SHA-256 d5c1a0970ed789c8…

MALICIOUS

PDF

86.5 KB Created: 2021-08-01 20:10:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: d52f6265e6e2abe0dfacc6c9a956aa5f SHA-1: 1896682e77b9c956b75d19e5a820d5c618c89375 SHA-256: d5c1a0970ed789c82ff9ce0fcb1e04fc5cf65b30505d8e3aa984168a829ff9fe
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 and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The document contains a large number of embedded URLs, many pointing to compromised WordPress sites, suggesting a link farm designed to redirect users to malicious content. The primary attack pattern involves luring users through these links, likely for phishing or malware downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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 https://medvor.ru/uplcv?utm_term=how+to+make+super+tnt+in+minecraft PDF link annotation
    • https://haps.company/wp-content/plugins/super-forms/uploads/php/files/i2ncrqoolnucp19ukuspnlfgf1/14599881798.pdfIn PDF document text
    • https://avenirpourtous.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160ba8069275d2---tasexakobivukerad.pdfIn PDF document text
    • http://lagunaapartman.hu/images/user/file/17071284693.pdfIn PDF document text
    • https://www.electriclighting.com/wp-content/plugins/super-forms/uploads/php/files/24e2b5de9cf1a291c7a031f9d6b5da48/1941060106.pdfIn PDF document text
    • https://carpanea.it/wp-content/plugins/super-forms/uploads/php/files/a0441e5df6b7bcd41ceb7dac448b25b2/lukojijojisukada.pdfIn PDF document text
    • http://anm-av.de/uploads/files/gitatoposulovamaluwib.pdfIn PDF document text
    • https://atolab.it/wp-content/plugins/super-forms/uploads/php/files/812f3ef8db6379cec8fd8e8429b4ccbd/62762351938.pdfIn PDF document text
    • https://mattweidnerlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608444e9acf6c---peziguwedefamizazuve.pdfIn PDF document text
    • https://www.energetisch-therapeut-estie.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16094558143809---guligoxa.pdfIn PDF document text
    • http://dorapeyzaj.com/userfiles/file/gadavuzovubewogilaweku.pdfIn PDF document text
    • http://coronado1977.com/clients/54390/File/kedakuzot.pdfIn PDF document text
    • https://rosycaffe.com/file/bibotunanaxobizifevavir.pdfIn PDF document text
    • https://banktapeunadana.com/tapeunadana/bank2/admin/userfiles/file/dazakiguxug.pdfIn PDF document text
    • https://csom.cz/wp-content/plugins/super-forms/uploads/php/files/f05eb93a27d7b9b056f32353859a5029/salezirozaxewa.pdfIn PDF document text
    • https://tamtam.com.ua/wp-content/plugins/super-forms/uploads/php/files/3eb6c26f6100ed10263784c754e2bd94/55609008576.pdfIn PDF document text
    • https://burstallconrad.com/editor_files/file/61027955451.pdfIn PDF document text
    • https://earthideasawnings.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cab990b7a82---52879926847.pdfIn PDF document text
    • http://pokorny-podlahy.cz/UserFiles/File/lemomovoz.pdfIn PDF document text
    • https://gulertrafik.com/wp-content/plugins/super-forms/uploads/php/files/rjkvgsul60s832qb0l6beia284/20147526149.pdfIn PDF document text
    • http://jar-ted.pl/file/lixebibisuvem.pdfIn PDF document text
    • https://leicht-spb.ru/wp-content/plugins/super-forms/uploads/php/files/9c22b9ebaee0c4ed4c3a1fab3843594d/mokemuzikakekuwa.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_off0000ef08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF08 10864 bytes
SHA-256: ef32151959ca9148377785aa0f343d61a10c8551a9bdf265216374c3ecb6fe66
font_01_sfnt_off00010830.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10830 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012042.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12042 17036 bytes
SHA-256: 704fb2f8572e7c532f40723c2494d55897bf45cf7aeb95ab6f6bcf9ccfac8870

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