Malicious PDF — malware analysis report

Static analysis result for SHA-256 566c1e4c9bca58af…

MALICIOUS

PDF

89.6 KB Created: 2021-09-03 18:55:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-17
MD5: 5fc21dd02108a5f1e24e3ea96a538e1a SHA-1: 5fcaa72d9b535295914d867bdd26d967c9cb6dc2 SHA-256: 566c1e4c9bca58aff6f12b9f6c2bab74f63afd2cb7fb581de18fba79d6a15c63
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. It contains a large number of embedded URLs, many pointing to compromised WordPress sites and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of these URLs and the overall structure indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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 https://wastran.ru/uplcv?utm_term=shimadzu+hplc+2030+manual PDF link annotation
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ade26a1dfa---tulasokipesolurazapan.pdfIn PDF document text
    • https://retta-bg.com/userfiles/retikedovamavamav.pdfIn PDF document text
    • http://grapes4u.ca/sites/all/sites/grapes4u.ca/files/70511536543.pdfIn PDF document text
    • http://mobilenmr.com/files/files/24052850268.pdfIn PDF document text
    • https://www.utn.ac.cr//sites/default/files/files/36871864457.pdfIn PDF document text
    • http://alexlunacoach.com/img/editor/file/tifetexaxofari.pdfIn PDF document text
    • https://amalighting.com/wp-content/plugins/super-forms/uploads/php/files/7601e70088078c782377e4a3338959d9/680397362.pdfIn PDF document text
    • http://nhadephoanhao.vn/upload/ckupload/files/jelofop.pdfIn PDF document text
    • http://www.lbf-cosmetics.com/website/wp-content/plugins/formcraft/file-upload/server/content/files/1608637f34055c---73703764832.pdfIn PDF document text
    • http://covinahigh1980.com/clients/1/14/147ee80f0cf2e08ca1b5067d21485a43/File/91790598939.pdfIn PDF document text
    • https://cffcommunications.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/16103b20ab351e---50533324334.pdfIn PDF document text
    • https://soba05.org/wp-content/plugins/super-forms/uploads/php/files/df3720107bda8b10f0cf77bf6c2c9c98/79474735878.pdfIn PDF document text
    • http://softwarefactory.nl/images/file/3799534496.pdfIn PDF document text
    • https://paradigma.bg/uf/file/89297244758.pdfIn PDF document text
    • http://vswet.ru/f/92380526886.pdfIn PDF document text
    • https://semagro-msw.ru/pics/images/file/53600138970.pdfIn PDF document text
    • http://changdahk.com/upload/17693181753.pdfIn PDF document text
    • http://bowie.abwingsmd.com/uploads/files/2273257942.pdfIn PDF document text
    • https://firsatoyun.com/calisma2/files/uploads/faxixadimomu.pdfIn PDF document text
    • http://winfielddeli.com/ckfinder/userfiles/files/19052215848.pdfIn PDF document text
    • https://tuvanthietke13-5.com/webroot/img/files/xadelifan.pdfIn PDF document text
    • https://www.euroservicemilano.it/wp-content/plugins/formcraft/file-upload/server/content/files/160ae8925e6ec7---80042627139.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_off0000f98c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF98C 18004 bytes
SHA-256: a7e2e8441ec83110816bb309cca1937e0f02fb611893bd2d652687fe92e7ae16
font_01_sfnt_off000128b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128B1 10808 bytes
SHA-256: 613153585a7bf3cb3fe48b7cb6068d082abe45b2aab65103c6fbd7b15d8962ae
font_02_sfnt_off00014170.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14170 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1