Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e5eb4fe7497e04b…

MALICIOUS

PDF

94.5 KB Created: 2021-08-09 08:44:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: d6863449e2fca85720ec98393c3a8f72 SHA-1: 6726903f54d8e629b08ed1eed5ac294942bc8d81 SHA-256: 1e5eb4fe7497e04bb0f87e47c255dd6f25374bdfac24e4c0670156ae07d2f7bd
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised WordPress upload directories. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan. The file's structure as a link farm suggests it is designed to redirect users to malicious sites, likely for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9979

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://almondzwealth.com/administrator/imagetemp/file/91081633658.pdf In PDF document text
    • http://africansafaris-spain.com/FCKeditor/editor/filemanager/connectors/php/connector.php?Command=FileUpload&Type=File&CurrentFolder=%2Ffile/jumoretetulusi.pdfIn PDF document text
    • https://0900107678.com/upload/file/16491130756.pdfIn PDF document text
    • http://alphasigmaoverseas.com/userfiles/file/18222380343.pdfIn PDF document text
    • https://gpagroup.in/wp-content/plugins/formcraft/file-upload/server/content/files/1608478cf0a55a---91283095530.pdfIn PDF document text
    • http://bergfin.se/wp-content/plugins/formcraft/file-upload/server/content/files/1609a681135fb0---96906596901.pdfIn PDF document text
    • http://xn--h49avwqct32ewe967crscpsaz7d.com/ckupload/files/mesosivumaroxo.pdfIn PDF document text
    • http://www.virtualaid.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160b1aa3b9d62f---repoxobejimokaxozotujos.pdfIn PDF document text
    • http://uniondeautoescuelas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160763cdc655b2---bebepejarigigizisujidomug.pdfIn PDF document text
    • https://pfollowers.com/ci/userfiles/files/87808012912.pdfIn PDF document text
    • http://maekuangudomthara.com/ckfinder/userfiles/files/25574460138.pdfIn PDF document text
    • http://maxitelt.no/wp-content/plugins/formcraft/file-upload/server/content/files/1606cddc5f3f58---27580683214.pdfIn PDF document text
    • http://france-ex.com/images/blog//file/21912385945.pdfIn PDF document text
    • http://lavalnerina.it/userfiles/file/dotesavetuvubovagizuliva.pdfIn PDF document text
    • http://deurenhanger.nl/userfiles/file/gafivigagodisive.pdfIn PDF document text
    • http://www.patricktennis.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160bdd83aef545---42578100603.pdfIn PDF document text
    • https://spazmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ccf5602f05---39262297717.pdfIn PDF document text
    • http://dabien.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/160809b20e82e1---98206615609.pdfIn PDF document text
    • http://adas-muko.pl/photo/file/34658894498.pdfIn PDF document text
    • http://www.elsecretodelolivo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b7f96be4c4c---jelumagabored.pdfIn PDF document text
    • http://kusadasidentalclinic.com/img/userfiles/files/makiselexid.pdfIn PDF document text
    • http://ckattorneys.net/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/42983488164.pdfIn PDF document text
    • https://www.lightingdynamics.com/wp-content/plugins/super-forms/uploads/php/files/c2d6ff0ca93f8aa2997bb5a3bb9c9544/41780195646.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=los+hermanos+karamazov+que+libro+leoPDF 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_off00010a97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A97 10836 bytes
SHA-256: 39140537effd5d6b18cf35eb5f5ed199b5338625cdc567aadd30ea366b50030b
font_01_sfnt_off00012366.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12366 18028 bytes
SHA-256: bc6b03501cf9bdbc2e574c3dc769dc61745f1afbfe18cfeab83886c2a35847cc
font_02_sfnt_off00015139.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15139 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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