Malicious PDF — malware analysis report

Static analysis result for SHA-256 068c4c8090a48bd6…

MALICIOUS

PDF

176.2 KB Created: 2021-08-02 08:53:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: ebb6669b6fbc8f4b55cce0b18b063ad5 SHA-1: be02fcae0acde11c7143a71e481fc1e49ff8acc2 SHA-256: 068c4c8090a48bd6fbb1c5e6e31a77f56de3eff8442c43bf59b731886f38f153
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to compromised WordPress sites, suggesting a link farm or SEO abuse tactic. ClamAV detected it as 'Pdf.Phishing.Trojan', and ML classifiers also flagged it as malicious. While no scripts were directly extracted, the nature of the links and the detection indicate a malicious intent, likely to lure users to malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9921

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://divinesacredshakti.com/wp-content/plugins/super-forms/uploads/php/files/ba6d3c0982be7f9d8de115bded0a251c/14231027975.pdf In PDF document text
    • http://villapellegrino.it/userfiles/files/xumezivirekimirabagunos.pdfIn PDF document text
    • https://centrobrands.com/wp-content/plugins/super-forms/uploads/php/files/9f162983df1dd2e25d2ebaa1f7c066a2/87573909939.pdfIn PDF document text
    • https://chongtham68.com/app/webroot/uploads/files/23002333901.pdfIn PDF document text
    • https://wpsqld.com.au/wp-content/plugins/super-forms/uploads/php/files/a453f2f08ce3a1ef1b7225f0fec3b10f/wekerobesivukenezuwunor.pdfIn PDF document text
    • http://gleneaglehoa.org/images/file/56358902511.pdfIn PDF document text
    • http://csc021.com/userfiles/file/20210625073748_jopjdi.pdfIn PDF document text
    • http://mdbim.pl/ubezpiecz/obrazy/file/58995246040.pdfIn PDF document text
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/90ea1bf7c177235d256f4fb577ebe915/10239033017.pdfIn PDF document text
    • http://photographybynami.com/wp-content/plugins/formcraft/file-upload/server/content/files/160afb0180c828---rugizesivu.pdfIn PDF document text
    • http://kimhoatra.vn/upload/fckimagesfile/47098997273.pdfIn PDF document text
    • https://holocaustresearch.pl/nowy/photo/file/gazumajexedifero.pdfIn PDF document text
    • http://krindustria.com.br/site/wp-content/plugins/formcraft/file-upload/server/content/files/160af3d02d62eb---58986455762.pdfIn PDF document text
    • https://iphonerepairservice.nl/app/webroot/files/userfiles/files/73947415312.pdfIn PDF document text
    • https://swimproject.eu/wp-content/plugins/super-forms/uploads/php/files/403d617b1fcb03fc0bbdc814d2f2ddd9/fabijava.pdfIn PDF document text
    • http://skolicka.eu/foto/images/file/97878696321.pdfIn PDF document text
    • https://kodcomputers.ro/2664/uploads/52170396856.pdfIn PDF document text
    • http://amctop.com/board_data/editor_img/file/202105202202.pdfIn PDF document text
    • https://foodvellythailand.com/upload/files/xijanexuligudi.pdfIn PDF document text
    • http://thevisionkharj.com/userfiles/files/91826603510.pdfIn PDF document text
    • https://cgeminfos.ma/upload/file/53911914690.pdfIn PDF document text
    • http://thesprotia.gr/uploads/file/virot.pdfIn PDF document text
    • https://hmv.ir/wp-content/plugins/formcraft/file-upload/server/content/files/160bfd3b313162---13788261998.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=what+is+crisis+on+infinite+earths+part+1+onPDF 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_off00023af9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x23AF9 16344 bytes
SHA-256: 5cd8a120e106fc2d4fc1855603a636a3ce922decfb1b4d98f17a4a5450337c58
font_01_sfnt_off000250f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x250F2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00026909.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x26909 10576 bytes
SHA-256: a90cb0edf4235ca71d7a74647ff3e1170e0b47eedd4b95d1616056bbe2fd100b
font_03_sfnt_off00028137.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x28137 18588 bytes
SHA-256: f28402266e4d96dcf19fbeb7f135e92d79b23d2556abe9a5b6a2cfc5ed5b296c

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