Malicious PDF — malware analysis report

Static analysis result for SHA-256 90030811c4263976…

MALICIOUS

PDF

85.7 KB Created: 2021-08-07 07:45:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-04
MD5: 75312ecbc199b248c8e3ac7ff7446519 SHA-1: ea2252619b3f169a3e9602a001334e835013af65 SHA-256: 90030811c42639762eab9ab6f03613756678564be1c0e47758542cf61e5e7673
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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 http://aksaaydinlatma.com/img/editor/image/file/31380789311.pdf In PDF document text
    • http://chronocertif.com/userfiles/file/lakasogowonifopenu.pdfIn PDF document text
    • http://eltonltd.ru/sites/default/files/uploads/xowekelagajagefizokuni.pdfIn PDF document text
    • http://vino-charlie.cz/userfiles/file/kajemi.pdfIn PDF document text
    • https://ratsimae.eemedia/contents/file/doporemikonoziroganekexe.pdfIn PDF document text
    • https://autoteam.in/ckfinder/userfiles/files/nepofiki.pdfIn PDF document text
    • https://www.emmabowman.com/wp-content/plugins/super-forms/uploads/php/files/2b938c20d979792e893caaff1128797f/71725518833.pdfIn PDF document text
    • https://webmodeli.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cd077edbeb---97086275343.pdfIn PDF document text
    • http://vegasoft.hr/wp-content/plugins/formcraft/file-upload/server/content/files/1609fe0274489a---taxop.pdfIn PDF document text
    • https://finestblogger.de/wp-content/plugins/super-forms/uploads/php/files/pps3lmpjtjvc0siucvt171hjp4/newezanelebulebiguviza.pdfIn PDF document text
    • http://lookupagency.es/wp-content/plugins/formcraft/file-upload/server/content/files/1610d5be85e762---wovelotakodirorapovo.pdfIn PDF document text
    • https://elitstroycraft.ru/source/file/gavavoluwebana.pdfIn PDF document text
    • http://posekatzahradu.cz/files/file/bilewupozixuzanirom.pdfIn PDF document text
    • http://phillipwhiting.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608474efe8a0f---togigixokutoluvasagixuke.pdfIn PDF document text
    • http://sam-global.ch/files/file/zodawave.pdfIn PDF document text
    • https://abril.pe/wp-content/plugins/super-forms/uploads/php/files/qmj51rsckhjipob3smtmj1oq4l/6081742476.pdfIn PDF document text
    • http://tsg-edinstvo.ru/userfiles/file/salulevokevuvinuwaborulu.pdfIn PDF document text
    • http://localhomesales.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607a329074edb---53884806426.pdfIn PDF document text
    • https://theshairpodcast.com/wp-content/plugins/super-forms/uploads/php/files/5c7da8844d25840a486bd6a67b43971a/33986264267.pdfIn PDF document text
    • https://www.sgestrecho.es/wp-content/plugins/formcraft/file-upload/server/content/files/16108e9e7b54a9---83436923434.pdfIn PDF document text
    • https://autosaloncenter.com/uploads/file/36131402908.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=ethos+logos+and+pathos+finderPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ec7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC7D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001048f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1048F 16852 bytes
SHA-256: eb79c57a0d3f587b50118f7ffcb339197c8b9f094a461eb128be4193c9f64717
font_02_sfnt_off00013072.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13072 10760 bytes
SHA-256: a557334a5d2d50cedf1562ffb0923ac11490917309c80b543b5018c441d78cb2

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