Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ddf9d0dcd1775ba…

MALICIOUS

PDF

88.4 KB Created: 2021-09-17 09:56:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: bc9b7aa79371cfd8f2ffc5ee6e5bfda4 SHA-1: d3b9fecf29186aba66b81d99db758e1df4cf669f SHA-256: 2ddf9d0dcd1775ba5e71e0ebf7e737bae95a9f11335e2dcbeae5627191ace488
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URLs, many of which point to suspicious domains and are likely used to redirect users to phishing or malware hosting sites. The presence of PDF-specific heuristics like PDF_SEO_DISPOSABLE_LINK_FARM further supports a phishing or malicious redirection attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://vdbergelectro.nl/wp-content/plugins/super-forms/uploads/php/files/b935e2d257fa0977f66a7a87a4481595/95942209182.pdf In PDF document text
    • http://deeringbayrealestate.com/userfiles/files/wusaluvovaf.pdfIn PDF document text
    • https://trompis-tondschungel.de/userfiles/file/50532528255.pdfIn PDF document text
    • http://www.specemc.ru/upload/files/51042210611.pdfIn PDF document text
    • http://merwepizza.com/upload/file/juberolefavumas.pdfIn PDF document text
    • http://forglory.cz/ckfinder/userfiles/files/71360150250.pdfIn PDF document text
    • http://askaudit.ru/price/94220487365.pdfIn PDF document text
    • http://findingthegrey.com/userfiles/file/vezofosepanis.pdfIn PDF document text
    • http://thaifilmind.com/UserFiles/file/76427628785.pdfIn PDF document text
    • http://www.alliance-bio.com/user_data/editor/ckfinder/core/connector/php/upload/files/dusetaxulapolifigitamo.pdfIn PDF document text
    • http://erainbowrealty.com/userfiles/file/fasamijurenu.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613dc25b5a883---papisusizig.pdfIn PDF document text
    • http://winecellarkeeper.com/ckfinder/userfiles/files/tutovelumefusugosekiki.pdfIn PDF document text
    • http://traktor-tv.de/sites/default/files/file/49589254333.pdfIn PDF document text
    • https://designclarf.it/file/lexunu.pdfIn PDF document text
    • https://refakatci.net/userfiles/file/zevagasabivinajemagu.pdfIn PDF document text
    • http://lexen.ca/userfiles/files/pizaxezili.pdfIn PDF document text
    • https://abhrian.com/userfiles/files/50328112296.pdfIn PDF document text
    • https://soenen-pneus.com/upload/file/nizosab.pdfIn PDF document text
    • http://proximeo.com/ckfinder/userfiles/files/repipizudibexosageri.pdfIn PDF document text
    • https://kasihpaham.com/contents/files/kotetodekikikakulaxodelat.pdfIn PDF document text
    • http://c2ctrading.org/cms_upload/files/62250554732.pdfIn PDF document text
    • https://www.benkorner.nl/admin/library/ckfinder/userfiles/files/61492078396.pdfIn PDF document text
    • https://tp-pos.com/uploads/image/files/54915207272.pdfIn PDF document text
    • http://ccadl.com/files/20210906040053.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=locate+my+tabletPDF 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_off0000f669.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF669 17980 bytes
SHA-256: 61cf1c59fe07945e71a0e8f3edbb9de96db0b07bd411de9a2bb6edf636cdbac6
font_01_sfnt_off00012541.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12541 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013d58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13D58 10140 bytes
SHA-256: 8476021e29a149dbb57edcb76f8e1dd29bee472dd309f4eb2c28c0e61c87dc25

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