Malicious PDF — malware analysis report

Static analysis result for SHA-256 e007f445a0977729…

MALICIOUS

PDF

71.5 KB Created: 2021-09-03 07:00:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 1dee4fa0b4dd6c009b3bf0eb6a17a2eb SHA-1: f8487b0d389267603541b278c9202e2a892987e1 SHA-256: e007f445a09777293dae5290b7a21c2fa0b80894cf5f9a6c79f2f3e862987082
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics, including a high-confidence ML classifier and ClamAV, indicating malicious intent. The presence of embedded JavaScript and numerous links, many pointing to compromised WordPress sites, suggests the document is designed to redirect users to malicious content or phishing sites. The primary attack pattern appears to be a phishing lure delivered as a PDF attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://pebyte.com/wp-content/plugins/super-forms/uploads/php/files/g3973hhu1taa880upg3dvkmfev/74817584116.pdf In PDF document text
    • https://lokmangal.co.in/wp-content/plugins/super-forms/uploads/php/files/94bc496e8ed0d2ca1d18f699fddca107/dunuzanegelixi.pdfIn PDF document text
    • http://zeci.nl/im/image/xawojizesosamijaxul.pdfIn PDF document text
    • http://www.stockholmswingallstars.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611ec46168817---3549851731.pdfIn PDF document text
    • http://hcvitamin.com/webroot/img/files/81677295013.pdfIn PDF document text
    • http://xn--aknmedical-yub.com/uploads/file/10453842585.pdfIn PDF document text
    • https://schreinerheusi.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607a383150750---risuxeduxazututajagimaz.pdfIn PDF document text
    • http://hengtaixin.com/HangShun/ckfinder/userfiles/files/supiligaruxareluwif.pdfIn PDF document text
    • https://jgmurphy.com/wp-content/plugins/super-forms/uploads/php/files/b0b65d1aff0a5a5647c56d283967baba/74384203773.pdfIn PDF document text
    • http://aceonlinementors.com/userfiles/file/naligekazibe.pdfIn PDF document text
    • http://baharemadinah.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ace5e6f053c---vapigidumuwijosajelo.pdfIn PDF document text
    • https://taichielite.com/louis/taichi/ckfinder/userfiles/files/furenivufozile.pdfIn PDF document text
    • https://www.kunapak.com/wp-content/plugins/super-forms/uploads/php/files/fj0b42rl3hfqaqmvclpt8rbdhl/fonalodowopavejirizataje.pdfIn PDF document text
    • https://ratoempat.com/contents/files/zodudarazukanisotazogoju.pdfIn PDF document text
    • http://weiken-rc.com/upload/files/27438238494.pdfIn PDF document text
    • http://halvani.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d03aa177716---64604936476.pdfIn PDF document text
    • https://rowadalbyt.com/userfiles/files/42294101690.pdfIn PDF document text
    • http://classiccar-jp.com/js/upload/files/bixafagodakudabovexexag.pdfIn PDF document text
    • http://www.mywil.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1607b69d916ab6---nadarelaw.pdfIn PDF document text
    • http://iideree.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608762b5d05f1---ripufegujutisub.pdfIn PDF document text
    • https://goldenparadisestsimons.com/wp-content/plugins/super-forms/uploads/php/files/206d3649cba9a0c997a22c009023764e/narepukon.pdfIn PDF document text
    • https://hasekei.jp/userfiles/file/lugamuduresubes.pdfIn PDF document text
    • http://stardentalcare.org/userfiles/file/liwox.pdfIn PDF document text
    • http://m4klynchburg.org/clients/3/34/34420611de4c9c7593cf5e5fe12de6df/File/xoworelufilari.pdfIn PDF document text
    • http://dlikefulproductions.com/clients/875850/File/75670711271.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=digital+library+software+list+pdfPDF 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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b7a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB7A7 10912 bytes
SHA-256: 8d9e874468ab19a3b0c64c59a66627d510c013ffce1664b0946e7c1f21b18894
font_01_sfnt_off0000d0b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0B3 15348 bytes
SHA-256: 65797a68cc6edded41c58b76b6ee35063f31c85197427cde125cbbca2c977eee
font_02_sfnt_off0000f848.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF848 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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