Malicious PDF — malware analysis report

Static analysis result for SHA-256 aeb22f7a5993c9b6…

MALICIOUS

PDF

95.0 KB Created: 2021-09-07 05:25:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 414e782cd7bc51d9f2c4005dac578439 SHA-1: df7817f68941cc87ede5513da9e7174109900fd4 SHA-256: aeb22f7a5993c9b62ab851f49171b0446f6e7a7f7eeaf2051556cc665108c410
164 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, indicating a high likelihood of malicious intent. The document contains numerous links to compromised websites and a visual download button, suggesting a phishing or malware distribution lure. The presence of multiple links to disposable hosting and compromised CMS uploads further supports a malicious campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9924

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://bringem.de/wp-content/plugins/super-forms/uploads/php/files/c3011b2215cb8c50824109be0056894b/16567540304.pdf In PDF document text
    • http://sva-jeanroze.com/xmedia/file/75454545735.pdfIn PDF document text
    • https://www.mclarenpress.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087994f2688a---80939942230.pdfIn PDF document text
    • https://egf.tw/test2/images/file/61363922309.pdfIn PDF document text
    • https://indacphuc.com/wp-content/plugins/super-forms/uploads/php/files/8pqumd402jfbgm16m46h2231j8/32823294454.pdfIn PDF document text
    • https://solarconsulting.org/wp-content/plugins/super-forms/uploads/php/files/34216fd1c6e3ce69aa29762af7e0bfe4/dejelavubawoparuledusa.pdfIn PDF document text
    • http://chandigarhdatarecovery.com/files/file/nozugidilegus.pdfIn PDF document text
    • http://usaoxin.com/userfiles/2021-6/file/27341430849.pdfIn PDF document text
    • https://noks.cz/wp-content/plugins/formcraft/file-upload/server/content/files/16136a4cf9bdff---jobepezega.pdfIn PDF document text
    • http://chocoenglish.com/_UploadFile/Images/file/nesefafukatas.pdfIn PDF document text
    • https://rebates.forex/wp-content/plugins/super-forms/uploads/php/files/1pcvo9kjb2ug1htsek1saak772/vipasikotitopivafir.pdfIn PDF document text
    • http://litho-and-co.fr/ckeditor/upload/files/telokexolesovunavum.pdfIn PDF document text
    • http://1960vonsteuben.com/clients/d/df/dfb5e1b83ea85bfdc5ef1da934264264/File/16306325818.pdfIn PDF document text
    • http://www.iqubz.com/wp-content/plugins/formcraft/file-upload/server/content/files/160709c190a3d5---koruganetuz.pdfIn PDF document text
    • https://senzedigicraft.com/wp-content/plugins/super-forms/uploads/php/files/2acfb1eaf93899ae24925d7f4fce6147/guzivagexetukogutasinuzi.pdfIn PDF document text
    • http://recrute.fr/files/files/wovamuxibewulivavojeso.pdfIn PDF document text
    • https://www.cfo-search.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8a9f33ece6---56727225895.pdfIn PDF document text
    • http://ipmarketing.net/userfiles/file/gewiriseraguruwazi.pdfIn PDF document text
    • http://ninda.vn/userfiles/files/13593609021.pdfIn PDF document text
    • http://zge-led.com/luodan/images/userfiles/file/11851579805.pdfIn PDF document text
    • http://www.publicitymailing.ie/wp-content/plugins/formcraft/file-upload/server/content/files/160a3fcd16bfe0---24728633964.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=split+pdf+adobe+xPDF 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e123.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE123 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f93a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF93A 10436 bytes
SHA-256: 563986cb160a9bfd9f236ae0221ce3c621ec243f7d4bdfca30f65967fbb27c59
font_02_sfnt_off000110c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110C5 1664 bytes
SHA-256: c737c1571b827a9af515084efd4d135d2c05ce8763284746c5506df3322eddb3
font_03_sfnt_off000118ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118AC 23956 bytes
SHA-256: a2e089cecca8967c8c8bddb6079b1816a99f4a8550174f5a554af82b468d43f7
font_04_sfnt_off00015633.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15633 16724 bytes
SHA-256: 3611974ae314671b254af62914757d266338d8c8e003dc143b2be4f0f86b5457

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