Malicious PDF — malware analysis report

Static analysis result for SHA-256 24e0b27c64beea2e…

MALICIOUS

PDF

81.5 KB Created: 2021-09-11 16:46:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 5d648b60b9c052410e1d5a4a1e12b1ef SHA-1: 22ee5380a50acc34a5f6b45d8918c5fd62a8dfb0 SHA-256: 24e0b27c64beea2e9dc74a0cdf736ffa067668c8004917e1bf5b926e8fd340b7
156 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to compromised websites or disposable hosting, indicating a phishing or malicious redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to lure users to malicious sites or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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://hk-bbc.com/upload/file/5642710474.pdf In PDF document text
    • http://thanglong.vn-greenenergy.com/ckfinder/userfiles/files/91678429022.pdfIn PDF document text
    • https://completecollegestrategies.com/wp-content/plugins/super-forms/uploads/php/files/79684e1ae3aca758298ca610291b0e68/xubepugowodatibebosibadex.pdfIn PDF document text
    • http://hyunshin.net/userfiles/file/dalugokejezesibuw.pdfIn PDF document text
    • http://sushistoryus.com/uploads/files/xagazozuwuvawud.pdfIn PDF document text
    • https://oazapiekna.com/zdjecia/fck/file/49432800384.pdfIn PDF document text
    • https://www.loscam.com/lib_common/ckeditor/ckfinder/userfiles/files/jabujek.pdfIn PDF document text
    • http://www.ufolep-69.com/contenus/files/66984329433.pdfIn PDF document text
    • http://inlikeflintlogistics.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613c84be47a66---59251789704.pdfIn PDF document text
    • https://www.penyembuhanholistikreiki.com/wp-content/plugins/formcraft/file-upload/server/content/files/161343e8223229---81375557427.pdfIn PDF document text
    • https://www.espymetcalf.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613bf819387b3---tatupawivase.pdfIn PDF document text
    • http://terezszilvia.com/images/uploaded/file/tijano.pdfIn PDF document text
    • https://cakesandcupcakes.net/userfiles/files/fajovizalisevevifazeneri.pdfIn PDF document text
    • http://lnyuanzong.com/uploads/files/20210908124714.pdfIn PDF document text
    • http://aromamahabaleshwar.com/ckfinder/userfiles/files/59495322910.pdfIn PDF document text
    • http://araulmor.tel-cor.com/images/library/file/jevoluzexamolusugotatofi.pdfIn PDF document text
    • http://box8websites.com/ckfinder/userfiles/files/83461890577.pdfIn PDF document text
    • http://www.miamiairportlimo.net/wp-content/plugins/formcraft/file-upload/server/content/files/1613c1a968f159---fuwakuxen.pdfIn PDF document text
    • http://intertravel.hu/_user/file/bunodalupojusomu.pdfIn PDF document text
    • http://auxerretv.com/content/public/file/purasorojiwuxozesitaseveg.pdfIn PDF document text
    • http://jocoseatee.com/userfiles/files/gonebofogigomawexoj.pdfIn PDF document text
    • https://drinkpoint.com/uploads/files/tipubipibopuvixa.pdfIn PDF document text
    • http://hotelrealerimini.it/userfiles/files/lunigojukitopeno.pdfIn PDF document text
    • https://bunexim.dascalita.ro/app/webroot/files/userfiles/files/jixomuvotudapopufusonume.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=android+message+comPDF 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_off0000dc7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC7F 16996 bytes
SHA-256: 1d9eed6d05dc203b8d76477adeb4ca9eb87ae2bcf64d02bf549f9c43789474b6
font_01_sfnt_off00010920.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10920 10552 bytes
SHA-256: 7eca8f80189d0e2cf44688c31a8739f90ded27b22069d9bebe1cb8387ba82cfc
font_02_sfnt_off000120ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120EF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1