Malicious PDF — malware analysis report

Static analysis result for SHA-256 bfc8a914f501dc01…

MALICIOUS

PDF

85.9 KB Created: 2021-09-06 19:09:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: d0c011608e36e638586b4d6bccce6e6f SHA-1: 462f25199f8f391a52a028d7810cfffc0a43d4cd SHA-256: bfc8a914f501dc017e011e41a6773471cdc7f6eaa379f3d19ad1c02e8ab35c27
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1055.001 Process Injection

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains a link farm with numerous URLs pointing to compromised WordPress sites, likely serving as a distribution point for malicious content. The presence of these links suggests an attempt to lure users to external malicious resources, aligning with phishing or malware distribution tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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 http://fapannimario.it/userfiles/files/50299349214.pdf In PDF document text
    • http://www.nbrownies.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c013b554a9a---kuxobatubuko.pdfIn PDF document text
    • http://lushexperiences.com/wp-content/plugins/formcraft/file-upload/server/content/files/160745f35ba63d---44879039518.pdfIn PDF document text
    • https://solener.info/ckfinder/userfiles/files/popazalitopapa.pdfIn PDF document text
    • http://iberia-ex.com/images/blog//file/dewix.pdfIn PDF document text
    • http://wellfoto.cz/pictures/files/zoxadaxat.pdfIn PDF document text
    • https://smobiil.eu/userfiles/files/pegozonazadafisirujepaxi.pdfIn PDF document text
    • https://www.hamburgeriaagricola.com/wp-content/plugins/super-forms/uploads/php/files/jos6s4g9t1mc69mn5k0vi62hgm/xadazafomajevavejuwasobiz.pdfIn PDF document text
    • http://www.everhouse.lt/wp-content/plugins/formcraft/file-upload/server/content/files/16108498a0ee58---delutixibobuses.pdfIn PDF document text
    • https://dycmc.com/DATA/upload/files/202106140935428730.pdfIn PDF document text
    • http://gchs1969.com/clients/867877/File/vufaxabarijavizi.pdfIn PDF document text
    • https://spencershaulageltd.co.uk/wp-content/plugins/super-forms/uploads/php/files/da6f8a65265152bea46387474772cfb0/jodoza.pdfIn PDF document text
    • http://paintingservicesonline.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16081416797469---21044640751.pdfIn PDF document text
    • https://autoroman-service.ro/imagini_ws/89508465873.pdfIn PDF document text
    • http://paymentsbusiness.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1612cca349a099---94840231170.pdfIn PDF document text
    • https://bykevin.com/wp-content/plugins/super-forms/uploads/php/files/068f66eed8ab12aa522808b62e40f9d8/11598285243.pdfIn PDF document text
    • https://atlasautoglass.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8e15da4384---zikav.pdfIn PDF document text
    • https://larioenergy.net/uploads/file/zosugofal.pdfIn PDF document text
    • https://patriot.ch/wp-content/plugins/super-forms/uploads/php/files/75ols5predece7oqjff6tkn28d/dulinemolunaminufoli.pdfIn PDF document text
    • http://allegroescrow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b31ec1e91a1---jezesimewinamewukesajili.pdfIn PDF document text
    • https://centrosteadycam.it/wp-content/plugins/super-forms/uploads/php/files/f6c884cbc9b721ecf78323ee9ca5621e/debiximopukifexamemuza.pdfIn PDF document text
    • http://sonsuadogo.org/Images_upload/files/mupadirobuwi.pdfIn PDF document text
    • https://masihpt2.com/contents//files/xagaliboruxiwizujemexe.pdfIn PDF document text
    • http://gardensyellowcab.com/admin/images/file/63701726493.pdfIn PDF document text
    • http://hitecds.com/userfiles/file/zuzofezakegasawad.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=que+es+el+calentamiento+global+pdfPDF 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_off0000e436.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE436 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fc4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC4D 11160 bytes
SHA-256: 7cac154a57f33a53fef4b116b60013ff62c939eeeeeafc37389815c244067451
font_02_sfnt_off0001160b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1160B 19532 bytes
SHA-256: 280671c2a0bdf045b9faebc87e29d7952adf94d54552d9bc070394bc22a6518b

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