Malicious PDF — malware analysis report

Static analysis result for SHA-256 80b34d5d4f89fd17…

MALICIOUS

PDF

82.7 KB Created: 2021-09-17 07:00:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 61f8d4bbe0368a87821568ffea24f171 SHA-1: c2de25cb48e5df78f09e746ea8dd11a6bc05c411 SHA-256: 80b34d5d4f89fd17f2473ff350d477eaa7341e64f641db0064551790e46e9d27
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous embedded URLs, many of which are part of link farms hosted on potentially compromised or disposable domains. The 'SE_PASSWORD_ARCHIVE_LURE' heuristic suggests the document may be instructing users to open a password-protected archive, a common tactic to bypass initial security scans. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://huntic.ru/uplcv?utm_term=iphone+12+launcher+os+14+ilauncher+control+center PDF link annotation
    • http://ls12368.com/userfiles/file/46244754314.pdfIn PDF document text
    • http://razaviota.ir/basefile/razaviotair/files/jibolabazo.pdfIn PDF document text
    • https://iphastkala.com/userfiles/file/91762683590.pdfIn PDF document text
    • https://clubslotalmatriche.com/calcas/file/zojukekafanugudaguzogimi.pdfIn PDF document text
    • https://tecnomatec.cl/upload/file/70484828070.pdfIn PDF document text
    • https://el-tall.pl/pics/file/23019043426.pdfIn PDF document text
    • http://muaah.ca/userfiles/files/77569369130.pdfIn PDF document text
    • http://askort.pl/Upload/file/gikelezozirolitadoke.pdfIn PDF document text
    • http://smepil.com/ckeditor/userfiles/files/87325377065.pdfIn PDF document text
    • http://smingames.com/ckfinder/files/dawozaneraruripiperav.pdfIn PDF document text
    • http://qhzs88.com/admin/fckeditor_upfiles/file/2021090206033780554.pdfIn PDF document text
    • http://sjccgy.com/userfiles/file/75978563291.pdfIn PDF document text
    • http://www.scmphotography.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/161373f497efba---xavazonidojejeruxedoj.pdfIn PDF document text
    • https://masihpt2.com/contents/files/pademupapaxenuriwu.pdfIn PDF document text
    • http://intechsol.kz/wp-content/plugins/formcraft/file-upload/server/content/files/16141cf440f211---nilukuxu.pdfIn PDF document text
    • http://sprostredkovanieuverov.sk/res/file/lewotitevufonuki.pdfIn PDF document text
    • https://beldaoyun.com/calisma2/files/uploads/kanexulaxiju.pdfIn PDF document text
    • http://bio-scan.com/userfiles/file/75012893826.pdfIn PDF document text
    • http://portableandcool.com/files/files/39421151715.pdfIn PDF document text
    • http://www.whirlpool-beachcomber.at/wp-content/plugins/formcraft/file-upload/server/content/files/161428e8270c4e---vamemukug.pdfIn PDF document text
    • https://office-agglo-larochelle.fr/userfiles/file/88902277698.pdfIn PDF document text
    • http://www.jysunshine-hotel.com/up_files/file/37889264763.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_off0000d7f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7F4 20048 bytes
SHA-256: 95f573577733f1972de29e1e02161b344ad92e83ae8f5f845a9b49c22bacbb96
font_01_sfnt_off00010c09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C09 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012420.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12420 10772 bytes
SHA-256: 813f6e2d560287e3d92db463f4b092ca7725d8f2d0d870839ae3c0d060d3f032

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