Malicious PDF — malware analysis report

Static analysis result for SHA-256 14f6eba2f767a0ba…

MALICIOUS

PDF

73.5 KB Created: 2021-06-25 09:43:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 698e00b2fda661402e4a8e44137fbf5d SHA-1: 508f96217208f4ce9697899a179f3f8f977b71d3 SHA-256: 14f6eba2f767a0baa0f7a55ae123a0d38901a3a08b2e11e3d3e02c791c85103d
156 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many hosted on compromised WordPress sites or disposable domains, indicating a link farm designed to redirect users. ClamAV detected this file as Pdf.Phishing.Trojan, and ML classifiers also flagged it as malicious. The presence of external URIs and link farms suggests the primary goal is to redirect users to malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://inwebjor.ru/uplcv?utm_term=milli+q+synthesis+manual
    • http://onnetsolution.in/userfiles/file/wesipofes.pdf
    • https://ahi.com.ua/wp-content/plugins/super-forms/uploads/php/files/500b77b4d43c029ec65040d5c42d036f/mopavesizet.pdf
    • https://www.dishdivvy.com/wp-content/plugins/super-forms/uploads/php/files/04b17e9ddf9a053e7946a33afb9c9daf/28483029886.pdf
    • https://www.northernillumination.com/wp-content/plugins/super-forms/uploads/php/files/67cd34e5f6ce5b621f1aefa4ad252228/70298519439.pdf
    • http://otelm4b.ru/admin/ckfinder/userfiles/files/bixit.pdf
    • https://estigotours.com/wp-content/plugins/super-forms/uploads/php/files/9f27bb499238cdeeeb2ac7a1955c147e/36607792828.pdf
    • https://schreinerheusi.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b1928fc1d97---24559066118.pdf
    • https://www.northernillumination.com/wp-content/plugins/super-forms/uploads/php/files/42e5b245ef4620bc6e9b74b10f280e1f/tutuxitijuk.pdf
    • http://in-dapt.com/wp-content/plugins/formcraft/file-upload/server/content/files/160afa60ee454a---diwogekumakerexu.pdf
    • https://bonpetsupply.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c856a2bee0---45218758708.pdf
    • https://www.actionconstructionjax.com/wp-content/plugins/super-forms/uploads/php/files/8e641b899b6d056821f354d39cebd15b/dadetuwafulovedorebupap.pdf
    • https://member-amz-seller-system.de/wp-content/plugins/super-forms/uploads/php/files/c9a9b7b726afc7af3ca206e4810ccdd1/32248892045.pdf
    • https://travolution.travel/wp-content/plugins/super-forms/uploads/php/files/caf2d639db5f28ee619ed56c6e25084a/pitelurusevil.pdf
    • https://www.sesc.com.ua/wp-content/plugins/super-forms/uploads/php/files/7im4re912mkjkqhepjctfhcbr1/66811294453.pdf
    • http://www.ambredore.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f0b877c556---97718357436.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160993d4673768---fopurusedaremezujatipowog.pdf
    • https://velvetskin.pl/wp-content/plugins/super-forms/uploads/php/files/ac24fc35bd79288bb7a4c7d2b03e9cf5/13614335323.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ddae.bin
b050cec96bba583022b51cda6fd95593ae6178aa88df0619cbdafae4e78f3f57		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDDAE 5060 bytes
font_01_sfnt_off0000eed4.bin
4462b39e309a180fde3ea170a31e9ef5bd4fcf1829026e5c0f74f6eb60f4c021		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEED4 12476 bytes

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