Malicious PDF — malware analysis report

Static analysis result for SHA-256 14a69627de92ef56…

MALICIOUS

PDF

72.8 KB Created: 2021-09-01 23:18:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: a958eedc09f2fa560a2e8a5bfc881444 SHA-1: e62735672d5f43b2782c7d0cc7f37c8719b430af SHA-256: 14a69627de92ef56adf4f8090fbe4fc4f390674f31315558609ac0c2ef9fd00a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is a PDF identified as malicious by ClamAV and an ML classifier. It contains numerous embedded URLs, many of which point to compromised WordPress sites, suggesting a link farm designed to redirect users. The presence of these links and the nature of the hosting indicate a phishing or malicious content distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9950

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://exactblue.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076d7c33b41f---59120908231.pdf In PDF document text
    • http://baanpowertrain.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b0c81d2e208---30171592514.pdfIn PDF document text
    • https://mudateconmigo.cl/wp-content/plugins/super-forms/uploads/php/files/565cf8e920ce8fc423cae8edbd279f50/69415484800.pdfIn PDF document text
    • http://progettarecasa.com/userfiles/files/namapagon.pdfIn PDF document text
    • https://afanasyev-design.ru/wp-content/plugins/super-forms/uploads/php/files/bbce3a1b9f9591047eccd69a9b07155c/riwakukajikajubolamiror.pdfIn PDF document text
    • http://stl-hk.net/userfiles/zikupukakikugika.pdfIn PDF document text
    • http://khiconghoixuancong.com/Khicong/admin/userfiles/file/87535062862.pdfIn PDF document text
    • https://rhythmcprandfirstaid.com/wp-content/plugins/super-forms/uploads/php/files/a905d8a3a99a87f1b33b227064c10494/lokusomuletogi.pdfIn PDF document text
    • https://cortopolis.ar/userfiles/file/99854943278.pdfIn PDF document text
    • https://coastalholidayproperty.com/ckfinder/userfiles/files/64133180369.pdfIn PDF document text
    • https://rrvchefs.com/wp-content/plugins/super-forms/uploads/php/files/a68013d7a1ed4e37fa350e3c0d07e009/nawovelakexomejasovove.pdfIn PDF document text
    • http://www.grupoaccs.net/ckfinder/userfiles/files/memafurobojozaganozav.pdfIn PDF document text
    • http://diskacme.dk/images/upload/file/67223815042.pdfIn PDF document text
    • http://caacoding.net/wp-content/plugins/formcraft/file-upload/server/content/files/160afe4cb471f8---mikeg.pdfIn PDF document text
    • https://tcufroghouses.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b08612cabd---wiwikotolape.pdfIn PDF document text
    • http://yaqeen-eg.com/userfiles/file/17652607826.pdfIn PDF document text
    • http://luckyassessoria.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608c22f830a2c---53735218505.pdfIn PDF document text
    • http://davidlbrooks.com/clients/868292/File/fimurulokolagawesirunusow.pdfIn PDF document text
    • http://premium-h.info/files/files/lukawibedigozevapore.pdfIn PDF document text
    • https://angkortaxiservice.com/userfiles/file/bezimojotonax.pdfIn PDF document text
    • https://sevsport.info/wp-content/plugins/super-forms/uploads/php/files/a245cc08145e9539759bc5346e8ad71f/98998375990.pdfIn PDF document text
    • https://advancedcheckcashadvance.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1ac500e2ac---42115135429.pdfIn PDF document text
    • https://aashianarealty.com/file/47790089814.pdfIn PDF document text
    • https://adasms.fr/userfiles/file/demaxilokadamo.pdfIn PDF document text
    • http://xn--80aafjbaeihgganggf9ajkncugh2a.xn--p1ai/pict/file/mezenegov.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=calculus+james+stewart+answersPDF 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_off0000b835.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB835 16880 bytes
SHA-256: f14d6e676dbd015ba0ac9bbb57965e3c15d145228d300a924c01509aa6b643bc
font_01_sfnt_off0000e42f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE42F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000fc46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC46 10524 bytes
SHA-256: e7b56e26b2d5f3607cb97355fe0b9008a1dc6177f6f3feb42bc7e998dc3a5cee

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