Malicious PDF — malware analysis report

Static analysis result for SHA-256 519fd47ce20abbe4…

MALICIOUS

PDF

93.1 KB Created: 2021-06-26 08:16:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15
MD5: e5d1955ad91489f34fac64964fb5f05d SHA-1: 7b7fada6686f38068242b761068dce7da043b4e9 SHA-256: 519fd47ce20abbe44f193a278f52da57a355205c9e285e0d167c00793af80bec
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous URLs pointing to potentially compromised websites and disposable hosting, suggesting a phishing or malware distribution scheme. The presence of embedded URLs and the nature of the heuristics indicate that this PDF is designed to redirect users to external malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9929

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://synerhu.ru/uplcv?utm_term=mary+poppins+chapter+summaries PDF link annotation
    • https://husvagnsexpo.se/wp-content/plugins/formcraft/file-upload/server/content/files/16090ea16e926a---53779580507.pdfIn PDF document text
    • https://www.lenoir-elec.com/wp-content/plugins/super-forms/uploads/php/files/fj8967ikm00u0tgn816voiplk1/27900055471.pdfIn PDF document text
    • http://bjaimama.com/data/upload/2021/05/file/202105250606364569.pdfIn PDF document text
    • http://toicodonlyson.com/uploads/files/80631968939.pdfIn PDF document text
    • http://learnersdigest.org/userfiles/file/90211286152.pdfIn PDF document text
    • https://www.businesswatchguardingservices.co.uk/wp-content/plugins/super-forms/uploads/php/files/ljvk0mib3veo5hpol9gkcjks7b/lonolajedamatunabeguge.pdfIn PDF document text
    • https://skyfireconsulting.com/wp-content/plugins/super-forms/uploads/php/files/58ml5k9ek95dkaq7dulkl2egp6/93192167042.pdfIn PDF document text
    • http://esrafisek.com/images_upload/files/dowasebapaguje.pdfIn PDF document text
    • https://arihantgranites.in/wp-content/plugins/super-forms/uploads/php/files/j5endipeku35ru4gsuftdnhcl0/93996507609.pdfIn PDF document text
    • http://www.kevinbrooks.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160799a4679d18---bodiz.pdfIn PDF document text
    • http://www.christinemartin.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a81afab3c83---51385744701.pdfIn PDF document text
    • https://samarpanbharat.org/trila/userfiles/file/75581858766.pdfIn PDF document text
    • http://cosyromania.com/media/file/13891097829.pdfIn PDF document text
    • http://sl-light.ru/design/img/upload/file/82548077185.pdfIn PDF document text
    • http://ytbozhuo.com/upload/file/311407504497.pdfIn PDF document text
    • https://teenvolunteer.org/wp-content/plugins/super-forms/uploads/php/files/32c43d419b86bc1e3396473e2661aa5b/wojubotaf.pdfIn PDF document text
    • http://ecolservizinettuno.com/userfiles/files/fopaporazisimijenemivi.pdfIn PDF document text
    • https://www.litesourcenc.com/wp-content/plugins/super-forms/uploads/php/files/ccf89c3a49cae8aeeeb83d6f606a6a5e/xebinasasagazaba.pdfIn PDF document text
    • http://gandolfiarchitetti.com/userfiles/files/18225721239.pdfIn PDF document text
    • https://elitteaccesorios.com/wp-content/plugins/super-forms/uploads/php/files/q9tcv36mncs0q915ga6re872jn/juzakukatudobowumenodel.pdfIn PDF document text
    • https://salubrismd.com/wp-content/plugins/super-forms/uploads/php/files/2880c9f9bbe863cc0c936702d9d0e83e/dilovasojagane.pdfIn PDF document text
    • http://pivotal-technologies.com/userfiles/file/rixawiv.pdfIn PDF document text
    • http://womensmentalhealthmd.com/clients/9/9a/9a9ccad1be43d50cbc9928f06550b956/File/40634838080.pdfIn PDF document text
    • https://udachi.co.th/wp-content/plugins/super-forms/uploads/php/files/ha51l22od362qpq6an3j6ktakv/kutulux.pdfIn PDF document text
    • http://famcareconnect.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609f24c7b1db9---38250591810.pdfIn PDF document text
    • 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_off00010959.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10959 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00012170.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12170 10800 bytes
SHA-256: 30450c1079d4aa41fbb4f8b769b2f5832e89587d1d3fd7a63aa2f9f969a10984
font_02_sfnt_off00013a31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A31 17152 bytes
SHA-256: 0c70a912cbef035d983bc7670a968b88dd2c3d905f6646548ab76e95a1e585de