Malicious PDF — malware analysis report

Static analysis result for SHA-256 aae7d15bce539021…

MALICIOUS

PDF

81.8 KB Created: 2021-07-08 06:00:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 4e5fc27c18fd5c1ea2b4c5d9de40dde5 SHA-1: c23503821012233ba4cd26e5a4072729c3a6d042 SHA-256: aae7d15bce5390216d72f4c3018e62ff9c4f512af20a6f2aafd13310f6033aad
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, forming a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to lure users to external resources.

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://fernandopelosini.it/userfiles/files/bodaxesagigog.pdf In PDF document text
    • https://thefertilizerequipment.com/d/files/kododib.pdfIn PDF document text
    • https://cambodiaangkorhomestay.com/userfiles/file/kanotinun.pdfIn PDF document text
    • http://wildpflanzen-planung.de/file/kawelomufajazaf.pdfIn PDF document text
    • https://sedefartphotography.com/resimler/files/mitazepebidokaw.pdfIn PDF document text
    • https://chemasan.lu/userfiles/files/87357366353.pdfIn PDF document text
    • https://arihantgranites.in/wp-content/plugins/super-forms/uploads/php/files/2ima2dm8t248e8ua71cgpj3m22/jujutuwukuwepe.pdfIn PDF document text
    • http://hyundailed.com/upload/editor/file/50191261424.pdfIn PDF document text
    • http://digemnd.com/UserFiles/file/99833169847.pdfIn PDF document text
    • http://densayhongngoai.com/uploads/userfiles/file/20597857713.pdfIn PDF document text
    • http://www.introspekta.si/ckfinder/ckeditor_uploaded_files/files/35187876291.pdfIn PDF document text
    • http://www.rolstoellift.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c17550cd92c---40175150969.pdfIn PDF document text
    • http://allegroescrow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160949e61b04cc---37319214713.pdfIn PDF document text
    • https://seroinstitute.com/wp-content/plugins/super-forms/uploads/php/files/998583f50ac01a2ae8c92ee293c2a9a2/66452283226.pdfIn PDF document text
    • http://staceyasp.com/UserFiles/file/vobazopivotef.pdfIn PDF document text
    • http://nmglyxx.com/userfiles/file/69519404507.pdfIn PDF document text
    • https://binhruamuinanobac.com/wp-content/plugins/super-forms/uploads/php/files/di6e1q7qenkskgkbg5kljn4dhv/90649847148.pdfIn PDF document text
    • https://amalighting.com/wp-content/plugins/super-forms/uploads/php/files/8a6a9f3e2f75d8b5fcf796d8f083a359/koxutenogetita.pdfIn PDF document text
    • http://touchpanelpro.com/upload/files/xupakewis.pdfIn PDF document text
    • http://aahsclassof1978.com/clients/b/b6/b6117739535924054831d33ecd54b00a/File/toditusepa.pdfIn PDF document text
    • http://www.guaitoli.eng.br/wp-content/plugins/formcraft/file-upload/server/content/files/16088babb99857---75529832658.pdfIn PDF document text
    • https://eyetracking.pl/userfiles/file/42930922561.pdfIn PDF document text
    • https://advancedbusiness.co/wp-content/plugins/super-forms/uploads/php/files/68411000c36a616ac077c1d769c290be/54991070337.pdfIn PDF document text
    • https://mzr-avocats.com/buddha/ckfinder/userfiles/files/kuguduvez.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=exercise+physiology+southPDF 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_off0000dc89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC89 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f49b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF49B 17180 bytes
SHA-256: 33a11731ed87875d5bd5bccaba2cdc560c0d332cd75e737052489296c00a4c6b
font_02_sfnt_off0001216f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1216F 10684 bytes
SHA-256: f10db5208c17a3da7f836f100227a18ca0365894d26ca5ba693f978503b7bec6

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