Malicious PDF — malware analysis report

Static analysis result for SHA-256 624d7bcba0f93672…

MALICIOUS

PDF

88.1 KB Created: 2021-06-26 04:49:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 4fb53b2cd1179b0d280f3ad14a0f3e16 SHA-1: d5f3dec19878edb0559f24f95c5399ceae0a4efd SHA-256: 624d7bcba0f936727f0218192f649b31c23a0c7d6dd5c48fe16524d6784cb57c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged by ClamAV as a phishing trojan and by an ML classifier as malicious. It contains numerous external links, many pointing to compromised CMS upload directories or disposable hosting, suggesting a link farm designed to redirect users. The presence of embedded URLs and the nature of the heuristics indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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://pixomot.ru/uplcv?utm_term=non+mutually+exclusive+events+examples PDF link annotation
    • https://aljazeerahpetroleum.ae/userfiles/files/28399132982.pdfIn PDF document text
    • http://xn--42-6kcdlkbomh7beggito5p.xn--p1ai/userfiles/file/97715156019.pdfIn PDF document text
    • https://selectwifi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aebe6817c8c---numodugonuvob.pdfIn PDF document text
    • http://finsura-lifedirect.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607ffc5ec4a1e---25908362687.pdfIn PDF document text
    • https://nada70.org/userfiles/file/3500551376.pdfIn PDF document text
    • https://hafa-verein.de/wp-content/plugins/super-forms/uploads/php/files/fa60b5381a302d0c5c9a021e1b6fe4f9/fegelonepiruwa.pdfIn PDF document text
    • https://www.tai.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160aa618f2020b---12548026796.pdfIn PDF document text
    • https://cncunse.com/d/files/15384598740.pdfIn PDF document text
    • http://seabeachthailand.com/UserFiles/file/wijasujavezigisifekat.pdfIn PDF document text
    • http://backupcenters.com/userfiles/file/93711342809.pdfIn PDF document text
    • http://www.urbanwaterways.info/files/66889251667.pdfIn PDF document text
    • https://maspacientes.es/wp-content/plugins/super-forms/uploads/php/files/a30dm1lb85aojdfevq2iu0nf61/zuwisasaxeb.pdfIn PDF document text
    • https://elitestrategyglobal.com/wp-content/plugins/super-forms/uploads/php/files/f70122d54af8d35f1bb84aa16bff7936/zevajolobegulelazin.pdfIn PDF document text
    • https://www.toptalentusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160af24b92f2f5---gufetogaxoziva.pdfIn PDF document text
    • http://apexnepaltravel.com/userfiles/file/11863623594.pdfIn PDF document text
    • http://www.greenbriarpropmgmt.com/wp-content/plugins/super-forms/uploads/php/files/9af2e4cbb317aff11b218ea038d3e8b5/detabiwonami.pdfIn PDF document text
    • https://gradeagroup.com/wp-content/plugins/super-forms/uploads/php/files/rvp7v6mnt95tc101rgsh4n34l6/lupisoluxuzenugu.pdfIn PDF document text
    • https://primewestelectrical.com/wp-content/plugins/super-forms/uploads/php/files/42cec34328100d328afbd2d3ced669ca/nubobevapitazoxigemujo.pdfIn PDF document text
    • https://g3az.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a6b4a5853c---48103871905.pdfIn PDF document text
    • http://www.rolstoellift.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ed9a7297b3---runagedib.pdfIn PDF document text
    • https://www.formwork.co.uk/wp-content/plugins/super-forms/uploads/php/files/mglo0cj4ljlcm41pnqau4vmehq/muxuxuzaderusipeje.pdfIn PDF document text
    • http://capmar.eu/userfiles/file/fukegewezetatugisiz.pdfIn PDF document text
    • https://unicornproduction.gr/wp-content/plugins/super-forms/uploads/php/files/b022575aa6600cf40ff57a07d92b2afc/tofitafidaneti.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_off0000f3d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3D9 17660 bytes
SHA-256: 90c04b03a07f4a3e5cdd6f99b8ca7fd8a6463ddf5943e5a53aee407b3298ca9c
font_01_sfnt_off00012245.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12245 10796 bytes
SHA-256: d56c1a3736c891623340a17caaa500db4466b8836eef1316e06e599b4c54f0c6
font_02_sfnt_off00013b3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13B3F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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