Malicious PDF — malware analysis report

Static analysis result for SHA-256 d487ead49cb7865b…

MALICIOUS

PDF

76.6 KB Created: 2021-09-13 23:15:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 73303ab8292ab954cf1057f17f61fa58 SHA-1: 69cb842a69f8cd9df11201fc2776b613f773facc SHA-256: d487ead49cb7865b59fc3a9da3314af7bca53e5a99d3707ca11877ed5042989d
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, a common technique for delivering malicious content or redirecting users to malicious websites. Several heuristics indicate the presence of external URIs and link farms pointing to potentially compromised or disposable hosting, suggesting a phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly support the malicious nature of this PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9963

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 https://infrive.ru/uplcv?utm_term=integracion+por+partes+pdf PDF link annotation
    • https://editionsitaliques.com/userfiles/file/verut.pdfIn PDF document text
    • https://hung168.tw/UserFiles/files/jowudupafowivolaxeg.pdfIn PDF document text
    • http://lindseyderence.com/userfiles/files/44147984373.pdfIn PDF document text
    • https://costumeworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/161300e7688a5a---xatobakawavibove.pdfIn PDF document text
    • http://barrybusiness-crm.com/ressource/devis-photo/files/labemosafufusinukewopovas.pdfIn PDF document text
    • https://www.energetisch-therapeut-estie.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1612fef02a564f---vurowesovob.pdfIn PDF document text
    • http://tentauto23.ru/ckfinder/userfiles/files/44624070755.pdfIn PDF document text
    • https://www.tulsarad.com/my_content/js/ckfinder/userfiles/files/bapaluke.pdfIn PDF document text
    • http://garderoba.sk/images/_file/xiwidexojebifaxu.pdfIn PDF document text
    • http://tk-weld.com/images/library/File/gudufuwineteka.pdfIn PDF document text
    • https://www.reparaciondebomba.com.ar/wp-content/plugins/super-forms/uploads/php/files/33vrsjhi7ue3drqlaibqis5rn6/nolipofomufapa.pdfIn PDF document text
    • http://nerezove-kuchyne.cz/UserFiles/File/68741797542.pdfIn PDF document text
    • https://georeno.ca/userfiles/files/38341865157.pdfIn PDF document text
    • https://0955205219.jwa.tw/userfiles/files/31943531947.pdfIn PDF document text
    • https://ijmscr.com/ckfinder/userfiles/files/24240506894.pdfIn PDF document text
    • http://pensionpoint.cz/userfiles/files/xevipikawaxiwipo.pdfIn PDF document text
    • http://pietrek.com/MARCUS/files/file/movipusasejarinitimufen.pdfIn PDF document text
    • http://grandioso.asia/editor_upload_image/file/33643672714.pdfIn PDF document text
    • https://vhssirimpanam.org/ckfinder/userfiles/files/bipevisoj.pdfIn PDF document text
    • https://migger.dk/userimages/file/91491781441.pdfIn PDF document text
    • https://ww150004.linebot.net/upfile/files/20210905192510.pdfIn PDF document text
    • http://abcgsgeds.friendship-match.com/upload/files/25589148388.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_off0000bffd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBFFD 19660 bytes
SHA-256: 1d2516515b095ba7f6fba17f9fa76d3905605190c3127a8db349390acc098ccd
font_01_sfnt_off0000f300.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF300 10700 bytes
SHA-256: 6b169afb22ad8468e25e3a2006e4a5d8b652547e2373e837f36b80b84a566ea9
font_02_sfnt_off00010b7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B7D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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