Malicious PDF — malware analysis report

Static analysis result for SHA-256 7af9886af1fc2a7d…

MALICIOUS

PDF

379.0 KB Created: 2021-06-14 18:26:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: a628bead283d239096422386c4171dad SHA-1: f864aacd451e0fb3919e9aa26b6f6136c2a1a3c2 SHA-256: 7af9886af1fc2a7d17b72e2a3c7681989723a281f3677db5a9aae1dc2035f83f
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains multiple links to external websites, many of which are hosted on compromised WordPress installations. The primary URL, 'https://allytemp.ru/uplcv?utm_term=2017+may+sat+answers', suggests a lure related to test answers. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect users to a phishing or malware distribution site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • 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.
  • 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://allytemp.ru/uplcv?utm_term=2017+may+sat+answers PDF link annotation
    • http://www.training4thefuture.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160c171a3e59d8---gigabed.pdfIn PDF document text
    • https://lashmakerpro.it/wp-content/plugins/super-forms/uploads/php/files/2dtjamcuumfo9s535qgopump95/73919641241.pdfIn PDF document text
    • http://manavpublicschool.org/manav/userfiles/file/nokibaxonufinusipazigodiv.pdfIn PDF document text
    • http://www.bash.cl/media/file/duremud.pdfIn PDF document text
    • https://apoiotelecom.com/imagens/img_fckeditor/file/valagosesapinilopowa.pdfIn PDF document text
    • http://mattstergamer.com/wp-content/plugins/super-forms/uploads/php/files/87qfha1f58oq1kk5gike56724q/56626958785.pdfIn PDF document text
    • http://barrarioservicos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160bec1f4ccc07---78027474687.pdfIn PDF document text
    • https://daaeportrett.no/upload/file/tipulakuxumijur.pdfIn PDF document text
    • http://nd-58.ru/wp-content/plugins/super-forms/uploads/php/files/2a9e6e1f60c1100d493206271ce01d7c/74820643590.pdfIn PDF document text
    • http://www.kevinbrooks.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160b7c53c331a5---4002032614.pdfIn PDF document text
    • https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/aklv752ovpq6ogoa7v3ovs7ac7/jupesinapepunin.pdfIn PDF document text
    • https://www.infratechgroep.nl/wp-content/plugins/super-forms/uploads/php/files/6afb338ed362b02eec7ad485695b773f/tegipadelejeg.pdfIn PDF document text
    • http://wakingbeauty.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b69b89c3d2---32520510001.pdfIn PDF document text
    • http://conservationenergy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b17f4e3af7---4642369055.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00013716.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x13716 389496 bytes
SHA-256: ca08ad79b8d861aa1382db6ef8e5b25ca1b6c1aa89180215b964c50352600e39
font_01_sfnt_off0005a610.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5A610 5304 bytes
SHA-256: fbbf89882a5bafdda5e44fee67179d6b4f102058453d7892be803793ae249b58
font_02_sfnt_off0005b821.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5B821 11308 bytes
SHA-256: 0380566309f74dc500c7ca9e7ea76198f8d9f548ae5122f08ac8eee569df938e

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