Malicious PDF — malware analysis report

Static analysis result for SHA-256 7868e93b49c8f382…

MALICIOUS

PDF

83.3 KB Created: 2021-08-07 00:52:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: fd51bd7e520942b57e293c35a8970642 SHA-1: 18ff213d6a697917ca1b2da178d0fcf03c79fa94 SHA-256: 7868e93b49c8f3828236582155a86bddd8f0ac3229b397dd4c39618b087e5a2f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs pointing to compromised websites, indicating a link farm designed to redirect users to malicious content. The ClamAV detection as 'Pdf.Phishing.Trojan' and the ML classifier's high confidence score further support its malicious nature. While no scripts were explicitly extracted, the structure and URL patterns are consistent with phishing or malware distribution campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://nomylo.ru/uplcv?utm_term=diabetes+and+ramadan+practical+guidelines+2018+pdf PDF link annotation
    • http://fortlauderdalelimorental.net/wp-content/plugins/formcraft/file-upload/server/content/files/1609ae60a08e8a---gudajumedatanoja.pdfIn PDF document text
    • http://e-pisanie-prac.pl/famprojekt_z_serwera/images/file/46262775130.pdfIn PDF document text
    • http://festivaldeliteraturadepereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f38008aa96---43197724605.pdfIn PDF document text
    • https://study-go.info/wp-content/plugins/super-forms/uploads/php/files/78ef4b60cf3fcedcbcc2e4b84023a460/70093652716.pdfIn PDF document text
    • http://files.ibiza-ferien.de/file/78644980691.pdfIn PDF document text
    • http://varosom.hu/userfiles/files/xamisipobuzufovogik.pdfIn PDF document text
    • https://bayardplaza.co.uk/wp-content/plugins/super-forms/uploads/php/files/ngpqp42m4o5eiden666fr3pnoh/32214954445.pdfIn PDF document text
    • http://imosa.asia/uploads//files/202108042205357463.pdfIn PDF document text
    • http://www.ausafrica.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1607c27bc6aecd---85147616408.pdfIn PDF document text
    • http://jessicarossitto.com/clients/7/7c/7c16b8c799dae9ffcd1258f31d6ff645/File/ridakapi.pdfIn PDF document text
    • http://skiflogistics.ru/userfiles/file/mulofib.pdfIn PDF document text
    • https://resonanceacteurs.nl/userfiles/file/58379161342.pdfIn PDF document text
    • http://xn--vb0b83rba554gca.kr/page_data/file/20210513031342.pdfIn PDF document text
    • http://myphammonly.com/luutru/files/bebuxikuno.pdfIn PDF document text
    • http://www.oknookna.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160c463b2c2144---95880646208.pdfIn PDF document text
    • http://joyear.com/ckfinder/userfiles/files/davewomirixir.pdfIn PDF document text
    • http://hanasushimenifee.com/uploads/files/52648292166.pdfIn PDF document text
    • https://www.hauptsache.cc/wp-content/plugins/formcraft/file-upload/server/content/files/1609c1810e58d0---xuwatesiwepazapinafus.pdfIn PDF document text
    • https://khabul.mn/mmpa/userfiles/files/votusodemum.pdfIn PDF document text
    • http://all-pass.com/folder/editor/file/57512485379.pdfIn PDF document text
    • http://ajtoablakcentrum.com/_user/file/25559935345.pdfIn PDF document text
    • https://khabul.mn/mmpa/userfiles/files/joperowukuxede.pdfIn PDF document text
    • http://qataminational.com/uploaded_files/userfiles/files/gadulujolekunuditalivem.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_off0000e001.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE001 16664 bytes
SHA-256: bc8bbe2d8b5ef5d8b2afdb6a74667e641e63216913a11536341f2e62ea1c7669
font_01_sfnt_off00010b44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B44 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001235b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1235B 11584 bytes
SHA-256: 39c87ed529c5420bbf76e2f2fdb2d933cb4a19a954c3d5d3e3e06fa58aca4be3

Open this report in the interactive analyzer, or submit your own file for analysis.