Malicious PDF — malware analysis report

Static analysis result for SHA-256 eaad5e686bc0dddc…

MALICIOUS

PDF

81.9 KB Created: 2021-09-03 02:24:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 364b33b719a0d066c63723bf533e0e7b SHA-1: e601a21c8c7de191316cb747103209a8f36e44f8 SHA-256: eaad5e686bc0dddcc7d5d4ee6025fdae0007538ca77f814ee897ec973dafd860
156 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. It contains numerous links, many pointing to compromised CMS upload directories and disposable hosting, suggesting a link farm designed to redirect users. The PDF structure and embedded links are consistent with phishing or malware distribution campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://asckhn.com/acskhn/userfiles/file/pabinofinixofowara.pdf In PDF document text
    • https://www.tangelo.no/wp-content/plugins/formcraft/file-upload/server/content/files/16086f76726824---puzezori.pdfIn PDF document text
    • http://parkwestresidences.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607907e253bd7---kodekibaka.pdfIn PDF document text
    • http://skolicka.eu/foto/images/file/fejare.pdfIn PDF document text
    • http://hzjksj.com/images/upload/File/22827707076.pdfIn PDF document text
    • https://nhanloc.net/userfiles/file/nisufawabepotukakalo.pdfIn PDF document text
    • https://muzeumkonstancina.pl/attachments/file/tirivemuxomoj.pdfIn PDF document text
    • https://praktijkbinnenstad.nl/file/xagegazoragagamobe.pdfIn PDF document text
    • http://cageart.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160ac311614b4d---dozesabidodomemajabaseguz.pdfIn PDF document text
    • http://aite-materials.com/upfiles/file/lewawusunaxaselupi.pdfIn PDF document text
    • http://heilpraxis-pankow.de/wp-content/plugins/formcraft/file-upload/server/content/files/160aa636104ef0---ludiwuwew.pdfIn PDF document text
    • http://africansafaris-spain.com/FCKeditor/editor/filemanager/connectors/php/connector.php?Command=FileUpload&Type=File&CurrentFolder=%2Ffile/65385203616.pdfIn PDF document text
    • http://artmetinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/160be31d74a8bd---kisuzuli.pdfIn PDF document text
    • http://www.oschouston.com/osc/wp-content/plugins/formcraft/file-upload/server/content/files/160cc204a508b1---90479760092.pdfIn PDF document text
    • https://ecef-groupe.com/wp-content/plugins/super-forms/uploads/php/files/b7o4pfdf9ssft0clk5llndkbk2/61266214884.pdfIn PDF document text
    • https://jagamimpi.org/contents//files/rakuwivudokoj.pdfIn PDF document text
    • https://bf-pomosch.ru/wp-content/plugins/super-forms/uploads/php/files/956noc2dvef1630lnpcl1rh224/72344814988.pdfIn PDF document text
    • https://cwlighting.com/wp-content/plugins/super-forms/uploads/php/files/b58c740a423337655c38961ec1479ca9/12895241381.pdfIn PDF document text
    • https://qualitylightsolutions.com/wp-content/plugins/super-forms/uploads/php/files/3b93b16746f3fbe863a06cc5d98b74fe/62972727026.pdfIn PDF document text
    • https://sanidom.pl/img/file/tubuferawijavanimulo.pdfIn PDF document text
    • https://ecomassage.pt/wp-content/plugins/super-forms/uploads/php/files/99lq8kve61hnqfiia8fgk6vjfb/nosizofabefus.pdfIn PDF document text
    • https://www.sacda.org/wp-content/plugins/super-forms/uploads/php/files/a8s9emc7foslfa4iq6fqqj06e5/jizijefepovebojuzutaxem.pdfIn PDF document text
    • https://bluza-shop.ru/content/File/64769946881.pdfIn PDF document text
    • http://taxicityplus.ru/userfiles/file/lutexe.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=estudio+del+r%C3%A9gimen+fiscal+de+empresas+constructoras+pdf+gratisPDF 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_off0000d437.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD437 11200 bytes
SHA-256: a8d4aa844a075115736618bc2ec7d00616b42bac12197f141579effae06cf8eb
font_01_sfnt_off0000ede8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDE8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000105fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105FA 18916 bytes
SHA-256: 37b81c7eade7bf6598d908f13ff2d7319c089b64300e6abde0633c23beb59482