Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f4423305c466e3f…

MALICIOUS

PDF

134.7 KB Created: 2021-07-30 01:54:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-17
MD5: b83604afc7c9bc5b68880a87b080788e SHA-1: 7c6590d2fcdc8bf92d5202155241032fd6c21c65 SHA-256: 0f4423305c466e3fd2c8b6b324571c1ee2882f2b3db6b687122ac0ecd13d6a6a
236 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious File

This PDF document employs a lure to trick users into downloading a password-protected archive, likely containing malware. It also directs users to install remote support tools, a common tactic for gaining unauthorized access. The presence of numerous links to potentially compromised websites and the ML classifier's high confidence score indicate a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9963

Heuristics 8

  • 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
  • Remote-support tool lure high SE_REMOTE_SUPPORT_LURE
    Document instructs the user to install, open, or connect with a remote-support tool such as AnyDesk, TeamViewer, Quick Assist, or ScreenConnect — high-risk in an unsolicited document
  • 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://ketchas.ru/uplcv?utm_term=autocom+delphi+2017+keygen+activator+download PDF link annotation
    • http://wittlich-luexem.de/userfiles/file/witisuviruxogafunor.pdfIn PDF document text
    • http://iwish-cosmetics.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ef39a554a2---34821965675.pdfIn PDF document text
    • https://edoxmarketing.com/wp-content/plugins/super-forms/uploads/php/files/vt06b0mtl0ln7aetethdvub2pp/vudopel.pdfIn PDF document text
    • http://masonhn.com/d/files/vafonezevuniludutak.pdfIn PDF document text
    • http://www.skupp.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1606ce747d9a03---minilakepovidumepex.pdfIn PDF document text
    • https://canadiancontractorservices.com/wp-content/plugins/super-forms/uploads/php/files/jthg4be1krl00na05csj2ugqq5/gakidetovorazosijogusak.pdfIn PDF document text
    • https://www.aironface.com/wp-content/plugins/super-forms/uploads/php/files/1742c7cb011511f9238acedc4ee8ea88/lokoxinivekufiruzemob.pdfIn PDF document text
    • http://syuncyoku.jp/upload/file/fatebok.pdfIn PDF document text
    • https://mygamedaysports.com/wp-content/plugins/super-forms/uploads/php/files/0746fa78ebe18a182c94e32e6016902b/74225453071.pdfIn PDF document text
    • http://www.almansori-ye.com/almansorifiles/files/voruxas.pdfIn PDF document text
    • http://bpsstudio.hu/uploads/67099905422.pdfIn PDF document text
    • http://argol-editions.fr/userfiles/file/36877194462.pdfIn PDF document text
    • http://www.garriagricola.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072ac2bcf355---pukakenojidikojixovesufa.pdfIn PDF document text
    • http://sicilalluminio.it/userfiles/files/55690545995.pdfIn PDF document text
    • http://analogsys.com/uploaded/file/859697588608e2ebf8d9be.pdfIn PDF document text
    • http://www.festivalmarrakech.info/wp-content/plugins/formcraft/file-upload/server/content/files/1607e7c55e5674---19286372090.pdfIn PDF document text
    • https://phase1acoustics.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c252a5a4dc9---leserepude.pdfIn PDF document text
    • http://perles-del-beya.com/userfiles/file/22311447144.pdfIn PDF document text
    • https://capitaleny.com/wp-content/plugins/super-forms/uploads/php/files/e1dd12103389cd763d1679fd41ecc096/dexotakiselawonasagugejud.pdfIn PDF document text
    • https://nolimitscenter.be/peausitive/images/FCKeditor/file/2122331775.pdfIn PDF document text
    • https://chinese-wall.tw/upload/files/barixomipowesuvixovaj.pdfIn PDF document text
    • http://www.ecostroyservis.ru/File/daligofinupiduna.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

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000192b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x192B4 16164 bytes
SHA-256: fd494554c7a7a2c4488382a78096c535ff133766c7221992be4f6a58596b2467
font_01_sfnt_off0001a82b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A82B 11576 bytes
SHA-256: 575b5c58d65034229dc1252f371cb7db55b11fe4aa95a3b83e9dcd0b3a3552b0
font_02_sfnt_off0001c379.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C379 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off0001db8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1DB8B 18328 bytes
SHA-256: 3af94fee64933957c2cd1028dcc9740080c0f3d92580da1d9ea6748c3d2da2cc

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