Malicious PDF — malware analysis report

Static analysis result for SHA-256 1167ebd0ba15f84b…

MALICIOUS

PDF

85.4 KB Created: 2021-07-04 01:00:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 0ae17ba2698672ecb3e6fc67f154aff2 SHA-1: 696f1efe620193736e351c01e0bd69108bac4c34 SHA-256: 1167ebd0ba15f84b06000c64115f7d399af12867c6dd19b43f2af81127f19408
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a link farm with numerous URLs, many pointing to compromised WordPress sites or disposable hosting, indicating a phishing or content distribution scheme. ClamAV detected this as Pdf.Phishing.Trojan, and ML classifiers also flagged it as malicious. The presence of multiple external URIs and a link farm structure strongly suggests the document's purpose is to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://salvatoredivilio.it/userfiles/file/xifukedojal.pdf In PDF document text
    • http://comicpapyrus.com/wp-content/plugins/super-forms/uploads/php/files/5f524c10996883cf823667f45e83c4f0/99401768370.pdfIn PDF document text
    • https://theemperorsoldclothes.co.uk/wp-content/plugins/super-forms/uploads/php/files/v9pqmc2in31rfq9u2ok8jf7ght/bofajerapupiwelurubogodi.pdfIn PDF document text
    • https://www.c2commercial.com/wp-content/plugins/super-forms/uploads/php/files/6521dbdd8dc2a144a2ecd14a45a55d9f/nedob.pdfIn PDF document text
    • http://findmealocalpainter.com/insurazon/admin/userfiles/file/muzozoluno.pdfIn PDF document text
    • https://bouwservicewinthagen.nl/userfiles/image/file/kojavopidafe.pdfIn PDF document text
    • http://cbestdesign.com/ckfinder/images_store/files/joxovigorusowozukelunejuj.pdfIn PDF document text
    • https://www.properties-thassos.com/wp-content/plugins/super-forms/uploads/php/files/cdrdd15jhm65hbuu5btnn3fg22/sesiwumosasobokusevi.pdfIn PDF document text
    • https://www.officinadelgustoroma.com/wp-content/plugins/super-forms/uploads/php/files/39151f9e9bb25cc8eafec3bd2e0efbd3/wasigibiga.pdfIn PDF document text
    • https://eghamatyab.com/basefile/bainbookcom/files/81221487743.pdfIn PDF document text
    • https://kvartira-zalog.ru/wp-content/plugins/super-forms/uploads/php/files/9ea7864c70539e1ec2cc0b3881d86842/dinusofopewa.pdfIn PDF document text
    • http://phatnang.com/media/ftp/file/62563842199.pdfIn PDF document text
    • https://barcelonamedicalcenter.com/files/galeria/files/welatoxekufigaxogetav.pdfIn PDF document text
    • https://mls.lighting/wp-content/plugins/super-forms/uploads/php/files/d9872305534a0007a114b5e7dc69399b/wolowemijomidolazagag.pdfIn PDF document text
    • http://kasintorn.com/images/upload/files/39211100833.pdfIn PDF document text
    • http://atut-biuro.com/uploaded/file/xurabazexan.pdfIn PDF document text
    • http://renovator.cz/files/file/10431933546.pdfIn PDF document text
    • https://goldengrowers.com/wp-content/plugins/super-forms/uploads/php/files/5f90fb495960680a964a1f190d065fda/xesus.pdfIn PDF document text
    • https://medicinasolidale.org/wp-content/plugins/super-forms/uploads/php/files/5d5ba9cc258ef5840b59b81c2f5f8bff/mokovabem.pdfIn PDF document text
    • https://aartipalette.com/userfiles/file/99335357084.pdfIn PDF document text
    • http://yorktownhs1987.com/clients/57482/File/17956808752.pdfIn PDF document text
    • https://www.prestigeautobody.com.au/wp-content/plugins/super-forms/uploads/php/files/74497be0e1df7b1d4e1c7006e1e766fc/31358106789.pdfIn PDF document text
    • http://www.ponderosafestival.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b809431289---zanepufibezagerufi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=signs+of+giardia+in+humansPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000edff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDFF 16336 bytes
SHA-256: 904b63f4715682394d152307dffc9871f820b05fb2ab619ebcabdd5786610877
font_01_sfnt_off0001185e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1185E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013075.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13075 10700 bytes
SHA-256: e2a085bbab07a4d62ccadab8f1fafd5c0d613ba68af8d240df19e2ccc7105128

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