Malicious PDF — malware analysis report

Static analysis result for SHA-256 69ae443390a7d1ce…

MALICIOUS

PDF

69.9 KB Created: 2021-09-29 01:08:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: 04bdf0e772318b935f2320854f5573ba SHA-1: d99bcae0591af0471840ae1838e804eb1a0bb312 SHA-256: 69ae443390a7d1ce702b882f6d595ed808a621ba1cff91a68766957b8a4bb673
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains a link farm pointing to multiple domains, some of which appear to be compromised CMS uploads or disposable hosting. The presence of 'utm_term=download' in one URL suggests a lure to download content, likely malicious. The document body is unreadable, but the heuristics strongly indicate a phishing or malware distribution attempt via malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://jfac.kr/ckfinder/userfiles/files/ziveparokesokazexelewenen.pdf In PDF document text
    • http://rubivina.com/Images_upload/files/gafevalov.pdfIn PDF document text
    • https://sistemagestiondpr.co/userfiles/file/winonazejadagu.pdfIn PDF document text
    • http://word.mn/uploads/assets/kixiweganegigonubu.pdfIn PDF document text
    • https://bloc-immo.com/images/63814550485.pdfIn PDF document text
    • http://tangneylaw.com/admin/images/file/47261579085.pdfIn PDF document text
    • http://www.luminicaambiental.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614f94236f4e0---duveruxanufapoto.pdfIn PDF document text
    • http://mhinflatable.com/upload/file/futarurutu.pdfIn PDF document text
    • https://annekienlen.fr/imagesfile/57817851063.pdfIn PDF document text
    • http://bippex.com/filespath/files/20210906154938.pdfIn PDF document text
    • https://mindweave.co.uk/wp-content/plugins/super-forms/uploads/php/files/704ph2ooccfsopb6e5mg42vr3l/70571272556.pdfIn PDF document text
    • http://thanhlamresort.vn/wp-content/plugins/formcraft/file-upload/server/content/files/1613cc5badd5d3---61064934669.pdfIn PDF document text
    • http://chinatriage.com/ckfinder/userfiles/files/67915651713.pdfIn PDF document text
    • https://pmsp-me.com/userfiles/files/2687082170.pdfIn PDF document text
    • http://www.myhhsi.com/wp-content/plugins/super-forms/uploads/php/files/1feb2f8fd991a7e6ba7987cae64a96e1/78621409497.pdfIn PDF document text
    • http://yogaschoolofkerala.com/photos/editor/files/15236986592.pdfIn PDF document text
    • https://artgallery.devctn.com/ckfinder/userfiles/files/pusukitosepizel.pdfIn PDF document text
    • http://pampa.be/uploads/userfiles/files/saruzigododudinuruwa.pdfIn PDF document text
    • https://anhhuynoithat.com/asset/files/wiboki.pdfIn PDF document text
    • http://4darchitecture.org/img/all/rafiga.pdfIn PDF document text
    • http://kingtonkatsu.com/uploads/files/xisodeduwuvawoz.pdfIn PDF document text
    • https://paroles-vives.com/ckfinder/userfiles/files/vajupesu.pdfIn PDF document text
    • https://www.olympusnorge.no/wp-content/plugins/super-forms/uploads/php/files/8oo7ppv2rlkq70391q3hc4d53m/32948983494.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=download+scary+teacher+3d+apk+modPDF 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_off0000afd2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAFD2 15936 bytes
SHA-256: d13edf7e662596ac10034ea8e93b3aa0ab43b2e89b94be39ba495d53fac671bf
font_01_sfnt_off0000d7ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7ED 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f004.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF004 11152 bytes
SHA-256: f4abad0a61770b37dd638b41c8e4dbc4602546a7c1de82a0b78d0431406f6965