Malicious PDF — malware analysis report

Static analysis result for SHA-256 d12e9092e359dc77…

MALICIOUS

PDF

91.3 KB Created: 2021-06-28 16:11:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 6dcae5d350e0957091f1a3ce4e5bc339 SHA-1: 053ef1c1d60c16ae4521efc8a130397a8cfd8e67 SHA-256: d12e9092e359dc777aef103f76b3773b3f328315fcc2f4f7b039b1386ad05ae0
156 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, with numerous URLs pointing to compromised CMS upload directories, suggesting an attempt to lure users to malicious content. The presence of multiple links on disposable hosting further supports a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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://english-island.pl/wp-content/plugins/super-forms/uploads/php/files/elueo120j0o2mmhbi8p0q8hr77/ponojukazilasaji.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b49e9d2fefd---36308999668.pdf
    • https://fastcomputer.vn/wp-content/plugins/super-forms/uploads/php/files/7a2b0078e1f1c105bc6be46042edec76/44486090888.pdf
    • https://www.mobytec.com.br/mobytec/wp-content/plugins/formcraft/file-upload/server/content/files/16090c9c4cb961---lokiretolifevibupo.pdf
    • https://rhagro.com.mx/wp-content/plugins/super-forms/uploads/php/files/e3cd0316e63cd9f67cd4ac7409130b39/94169213595.pdf
    • http://multiseal.com.ph/wp-content/plugins/formcraft/file-upload/server/content/files/160a7e402ad44a---41348906296.pdf
    • http://www.tramag.pl/upload/file/16129863004.pdf
    • https://www.lesson-online.org/wp-content/plugins/super-forms/uploads/php/files/nskb2jvr5o0mtgcrp2r85l35n7/9524299482.pdf
    • http://principessavencanice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c686f704bc8---xuxetur.pdf
    • http://detikakdeti.ru/img/file/vutudivibagaji.pdf
    • http://goldmustang.com/files/files/dejam.pdf
    • https://bbensonmft.com/wp-content/plugins/super-forms/uploads/php/files/663ae744e6675f4fdb5bb97e52f2f04a/16261367200.pdf
    • https://areshin.ru/wp-content/plugins/super-forms/uploads/php/files/782c321716abfceafb5330d527a0c54c/34233024496.pdf
    • https://kltccompany.com/ckfinder/userfiles/files/65843745453.pdf
    • https://extremetour74.ru/wp-content/plugins/super-forms/uploads/php/files/5601dfb6cdd26e7770714948b52e668a/56347375861.pdf
    • https://loan-financial.com/wp-content/plugins/super-forms/uploads/php/files/523626ac9190fe33bcf063cafbe7a633/ditidaseribe.pdf
    • http://www.iso-clean.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1609657423a811---sojizuwudowuni.pdf
    • http://iideree.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607876d9921f9---49652357302.pdf
    • https://atlanthealth.com/wp-content/plugins/super-forms/uploads/php/files/9303858f6bdd82f5515c7b7781a40cd6/53469069213.pdf
    • http://www.myhhsi.com/wp-content/plugins/super-forms/uploads/php/files/a8e5afcc8d99e9ab985b2b13d6456ff0/1119712670.pdf
    • http://dataction.org/demo/dataction/media/milinugevemure.pdf
    • https://anmoul.com/userfiles/file/10803073533.pdf
    • http://101-games.ru/images/uploads/files/noxokexafi.pdf
    • http://www.urbanwaterways.info/files/beberileki.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c88a914f765---67161495508.pdf
    • https://namastehealth.in/wp-content/plugins/super-forms/uploads/php/files/c7eo0khr6nkc4658ovhfooo0rc/zulirimomebuloxe.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=the+forest+starter+guide
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000101b3.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x101B3 16792 bytes
font_01_sfnt_off000119c5.bin
aa8d356486bee5eb570c101fe5a5ae2a4ca8d8b310064287f5035ff08c9dd647
pdf-font-stream PDF embedded font (sfnt) at offset 0x119C5 17468 bytes
font_02_sfnt_off00014805.bin
3df656f86ae3875bbdc984b00f17dfab1b150ca52f674cd4631d7b7e9cc002c7
pdf-font-stream PDF embedded font (sfnt) at offset 0x14805 10544 bytes