Malicious PDF — malware analysis report

Static analysis result for SHA-256 74ba047c44a2af36…

MALICIOUS

PDF

90.8 KB Created: 2021-06-28 23:32:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: b66c997b72a1f856424e54323d15d406 SHA-1: 5235cb4ad7af24c1364d89cc291a564e074f60c0 SHA-256: 74ba047c44a2af360f85cb1d7cfac99aac2e05186c166fc52d319d2126611601
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The document contains a link farm pointing to numerous distinct hosts, many of which appear to be compromised WordPress sites or disposable hosting, suggesting an attempt to distribute malicious content or conduct phishing. The presence of external URIs and link farm characteristics strongly indicates a malicious intent to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9932

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://www.aluvascientific.com/UserFiles/file/rolisunevopusozoxuten.pdf In PDF document text
    • http://www.houstonorientalrug.com/ckfinder/userfiles/files/setefamesu.pdfIn PDF document text
    • http://jrmhandling.nl/upload/file/72603203993.pdfIn PDF document text
    • https://luxurytravel-show.com/wp-content/plugins/super-forms/uploads/php/files/87e396f49e8cd89e99a5da8f1d82fcef/37808982264.pdfIn PDF document text
    • http://watdoenwevandaag.nl/upload/39698631259.pdfIn PDF document text
    • https://stagerightstaging.com/wp-content/plugins/super-forms/uploads/php/files/62254cd9c706ea710715ddc8988dd570/bulemer.pdfIn PDF document text
    • http://studiotecnicoprato.eu/userfiles/files/japifikidowubune.pdfIn PDF document text
    • http://verynailscm.com/user_img/file/zobewaxetusomemebisixo.pdfIn PDF document text
    • http://alliance-ic.ru/uploads/file/84398766063.pdfIn PDF document text
    • http://www.kreasoft.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160c4be4e875fe---xikozomikaxibozekuduwofoz.pdfIn PDF document text
    • https://fortlauderdale-carservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a871546c3d5---92304710815.pdfIn PDF document text
    • https://jclifeschools.org/wp-content/plugins/super-forms/uploads/php/files/d584e6509282d97d165a9f441fcbb6bf/90305285995.pdfIn PDF document text
    • https://mzr-avocats.com/buddha/ckfinder/userfiles/files/lokes.pdfIn PDF document text
    • https://realimpacto.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b1f6b52ef12---8701151607.pdfIn PDF document text
    • https://amiablediamonds.com/wp-content/plugins/super-forms/uploads/php/files/319879092cf79f9d815d3c6c4513f7b5/60391970815.pdfIn PDF document text
    • https://qboardapp.com/wp-content/plugins/super-forms/uploads/php/files/c3e4587525a2c9ec93efce605cb3fc47/76940816072.pdfIn PDF document text
    • http://peaceinsrilanka.lk/userfiles/file/nudewenipititiz.pdfIn PDF document text
    • https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/681ec950e3c5638d7e4dab5bf686a3c0/xexupisekadaba.pdfIn PDF document text
    • http://dangkykinhdoanhkiengiang.com/upload/ck/files/56967435601.pdfIn PDF document text
    • https://sygimportaciones.com/wp-content/plugins/super-forms/uploads/php/files/vres6mkeckd3sf9ha5pee40gsv/zinukatalojinuvemomon.pdfIn PDF document text
    • https://stakeoutllc.com/wp-content/plugins/super-forms/uploads/php/files/1a6bbbaeecaa78f58740571f7e3ffdaa/dobetan.pdfIn PDF document text
    • http://bassbasement.org/userfiles/file/bekutalirujupoduzam.pdfIn PDF document text
    • http://maidichike.com/upload/files/samuposes.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=among+us+imposter+hack+pcPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e7a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7A2 18200 bytes
SHA-256: 625e7fba1e35f7a90c28bbfc784b9a347b7b9b6af1f5932210f501bb14b3546d
font_01_sfnt_off0001166e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1166E 10948 bytes
SHA-256: 20a5cb32784e320709ddc7ba06a39a0df78db1ea5b9fb16f121990e6c9080bb0
font_02_sfnt_off00012fb4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12FB4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off000147c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x147C5 16340 bytes
SHA-256: 88a5f3ad9079b2340172ecd64f1cd79ba1ad1753eb2b73e58de10c5a7be67d15

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