Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0180a76118437a1…

MALICIOUS

PDF

82.3 KB Created: 2021-07-28 08:07:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 86aabb17809f2fc30af65551d1dd5980 SHA-1: 48ee6c2a73152c2de48c2800ecc25906d9144782 SHA-256: b0180a76118437a197c07c756c9cc093a1667a368360054b85f9b394e4d87866
156 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links, many pointing to compromised WordPress sites, suggesting it's part of a link farm designed to direct users to potentially harmful content or phishing pages. The presence of multiple external URIs and link farm heuristics indicates a malicious intent to redirect users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://pavcargo.ru/wp-content/plugins/super-forms/uploads/php/files/e5922450504ad07bb036ebb9c5c012de/7055380630.pdf In PDF document text
    • https://himalayanthailand.com/image/upload/File/vesarozesimiwosetota.pdfIn PDF document text
    • https://g-ortho.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608db3b5533ae---6214018634.pdfIn PDF document text
    • http://dansensvenner.dk/imagesfile///43520526010.pdfIn PDF document text
    • http://inspirationallabels.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160c8629d68904---pagibomusalugimixamifimoj.pdfIn PDF document text
    • http://kxnjl.com/userfiles/files/momikapigawodu.pdfIn PDF document text
    • http://mko-yug.ru/wp-content/plugins/super-forms/uploads/php/files/89bc91f36d62a1a8e368e6b2ed40971c/33561776818.pdfIn PDF document text
    • http://rld-carbon.ru/file/zejogasezujebulesutomoze.pdfIn PDF document text
    • http://sziazsauto.com/uploads/files/66136594377.pdfIn PDF document text
    • http://driver-jazda.pl/upload/file/11329195357.pdfIn PDF document text
    • http://phantasos.org/userfiles/file/45156262743.pdfIn PDF document text
    • https://www.financedeclined.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160b6f7edc06ec---14077575213.pdfIn PDF document text
    • http://brandnewgoods.net/userfiles/file/vezasepefufovegifabak.pdfIn PDF document text
    • https://sanidom.pl/img/file/81310245620.pdfIn PDF document text
    • http://oneself.pro/wp-content/plugins/formcraft/file-upload/server/content/files/1609dd8c6bee45---gavemugunogezisivas.pdfIn PDF document text
    • https://sdyh.gr/wp-content/plugins/super-forms/uploads/php/files/co6uk10bl576mtss2uclgk5677/27145129300.pdfIn PDF document text
    • https://zlato-eu.cz/upload/files/48646144535.pdfIn PDF document text
    • http://plusbateria.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b0978d9083e---kulijikixerimepugebalude.pdfIn PDF document text
    • https://sasalidayanisma.org/uploads/file/50677838728.pdfIn PDF document text
    • https://www.rowtheerne.com/wp-content/plugins/super-forms/uploads/php/files/9bf1b819c7123a8cbd3c2689ccd902c4/gijuluwarorelugelafikifap.pdfIn PDF document text
    • http://www.nisbd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e7c3d7aac8e---2778576979.pdfIn PDF document text
    • http://kidneytracker.com/ckfinder/userfiles/files/kevagodogugikunow.pdfIn PDF document text
    • http://thehawthornnyc.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d658a7ce8d---zijutaxo.pdfIn PDF document text
    • http://kfbi.ru/content/file/18160387988.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=how+to+program+genie+remote+acsctg+type+3PDF 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_off0000ddf1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDF1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f603.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF603 16736 bytes
SHA-256: 05a9119f35021748a8e0c19bfb8463b77cd6abd92574552e7055c505190b0e17
font_02_sfnt_off0001219d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1219D 11036 bytes
SHA-256: 8dce21ef97a67ff95e841043e9dbaae46b7613b96287d1d2830cac8f14d8cfaf