Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c2e7543ee80dae6…

MALICIOUS

PDF

72.0 KB Created: 2021-10-01 17:34:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 0ea831c3ceb0c8e7a0581bf7c325efc4 SHA-1: fdf6015435b34c6935838b287a9909295dd5433a SHA-256: 2c2e7543ee80dae6b1972885c5851bb3a739de04f9446902a919076632901a97
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The document contains a link farm pointing to numerous domains, many of which are hosted on compromised CMS uploads or disposable hosting, suggesting an attempt to distribute malicious content or phish users. No scripts were extracted, but the presence of external URIs and link farms indicates a malicious intent to redirect the user.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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 https://tranthachcaodanang.thicongmaiche.com/uploads/image/files/45384701547.pdf In PDF document text
    • http://stark-tools.ru/images/uploaded/69608202957.pdfIn PDF document text
    • http://www.fotografoeventimilano.com/wp-content/plugins/formcraft/file-upload/server/content/files/161411b1c3d673---dexajulizekunebilomolenoz.pdfIn PDF document text
    • http://miyozenemeryville.com/uploads/files/20967066777.pdfIn PDF document text
    • http://lalitas-thaimassage-spa.de/wp-content/plugins/formcraft/file-upload/server/content/files/16146806ed73b5---fididawifatavasuf.pdfIn PDF document text
    • http://geojeoceanhotel.com/userfiles/file/20210924175721.pdfIn PDF document text
    • http://www.corazondelsol.es/ckfinder/userfiles/files/fabupukiwuxe.pdfIn PDF document text
    • http://firewaterdamagedfw.com/test/fckeditor/uploadfiles/file/gitot.pdfIn PDF document text
    • http://nyitotthetvege.kastelyszallodak.hu/userfiles/files/megukuvupijum.pdfIn PDF document text
    • http://ei-windykacja.pl/upload/file/6534266722.pdfIn PDF document text
    • https://bientannamhuy.com/wp-content/uploads/files/38290467031.pdfIn PDF document text
    • https://angkalaris.com/contents/files/87582296155.pdfIn PDF document text
    • http://barrarioservicos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16132daec5030b---leberuzugazafebuzide.pdfIn PDF document text
    • https://alusol-kw.com/ckfinder/userfiles/files/fosiwurakubokamabus.pdfIn PDF document text
    • https://polandpools.com/contents/files/fipeworizikutijanixoxada.pdfIn PDF document text
    • https://rugsdirect4u.com/uploadedfiles/file/60732601300.pdfIn PDF document text
    • http://www.hon-ro.hu/userfiles/files/tenibawusabasibuv.pdfIn PDF document text
    • https://www.booster-p.com/wp-content/plugins/formcraft/file-upload/server/content/files/161433fea52be3---51776065981.pdfIn PDF document text
    • http://bright-inter.com/file_media/file_image/file/sopodereresudabililetep.pdfIn PDF document text
    • https://securitydm.net/slicice/file/vidibugezabizek.pdfIn PDF document text
    • http://akvari-um.ru/userfiles/file/xaraposeraradidozuzixibol.pdfIn PDF document text
    • http://hvpeds.com/upload/contents/file/45231878128.pdfIn PDF document text
    • https://ddnepal.com/assets/userfiles/files/98510868475.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=how+to+log+into+someones+snapchat+without+the+passwordPDF 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_off0000b320.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB320 11140 bytes
SHA-256: f29e9c07e8bea2d8e2dddc567ac196d239caffb0a400246643b07a2c1d7ae89f
font_01_sfnt_off0000ccb8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCB8 17028 bytes
SHA-256: 489129a98444af73be528cd60e83abbe15080f307f8bc24069c812187c8541b5
font_02_sfnt_off0000f7f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7F6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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