Malicious PDF — malware analysis report

Static analysis result for SHA-256 1bf4d121f5b896b6…

MALICIOUS

PDF

90.1 KB Created: 2021-09-06 03:50:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: bc2e9d1aa981c23c8088979abced3f36 SHA-1: 7cfc5fe48278bce2a5992d61de98ff6f6fa6ab0e SHA-256: 1bf4d121f5b896b6ba7b1387ddec50abadf36de3d09e1b8115047d0e4b15d73c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file is identified as malicious by ML classifiers and ClamAV, indicating a phishing or malware distribution attempt. It functions as a link farm, directing users to multiple external URLs, some of which host other PDF files, likely to further distribute malicious content or conduct phishing. No scripts were extracted, but the presence of numerous external links suggests an attempt to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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://perleyparish.org/wp-content/plugins/super-forms/uploads/php/files/554da0a22d9994b552a803afb701d839/ralorixazotajoledoke.pdf In PDF document text
    • https://www.okcfarmersmarket.com/wp-content/plugins/super-forms/uploads/php/files/5777dccca2575116b982f90f4ba05cde/81294792545.pdfIn PDF document text
    • https://www.frankreich-ferien.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1607cae8c390f1---vobesalibubagibag.pdfIn PDF document text
    • https://flexrocksrollovers.com/wp-content/plugins/super-forms/uploads/php/files/267rsjrti85slv6dr787cjaqg5/lirawatipedozefazokuzunu.pdfIn PDF document text
    • http://naasschoolofmotoring.com/fckeditor/userfiles/file/dibefubowutupo.pdfIn PDF document text
    • https://k-kompany.ru/wp-content/plugins/super-forms/uploads/php/files/84d80a6481230b7c98c7bbedf2184121/72345485200.pdfIn PDF document text
    • https://xuantruongtech.com/images/ckeditor/files/rexeridutewetudo.pdfIn PDF document text
    • https://divorcioconsensual.com.br/wp-content/plugins/super-forms/uploads/php/files/86cb320da5a74303f2862a6da8c3e937/vukerebetawememewa.pdfIn PDF document text
    • http://kpdb.org/userfiles/files/vuvujufus.pdfIn PDF document text
    • https://glosunspa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c4878d48d9b---nopefobuberemudoko.pdfIn PDF document text
    • http://russkiivopros.com/images/FCKeditor/file/27708774559.pdfIn PDF document text
    • http://lejuriste.ru/files/file/jibemukusunufado.pdfIn PDF document text
    • https://antoinepanau.com/wp-content/plugins/super-forms/uploads/php/files/f2b24e7a24283877de74e5bc135bd4e3/17170829637.pdfIn PDF document text
    • http://ambvet-trefontane.eu/userfiles/files/93457689686.pdfIn PDF document text
    • http://albatrossmrn.com/konadnew/userfiles/file/nipedelo.pdfIn PDF document text
    • https://cnn-logistics.com/asset/files/jekibilolapuxep.pdfIn PDF document text
    • http://beastyenergy.com/userfiles/file/87936547933.pdfIn PDF document text
    • https://postelezmasivu-olomouc.cz/ckfinder/userfiles/files/zexugikajijotin.pdfIn PDF document text
    • http://hanasushichoice.com/uploads/files/47361597408.pdfIn PDF document text
    • https://www.marthatrotts.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160848f7763cdb---doninizejixikapegulu.pdfIn PDF document text
    • http://www.tenniscanberra.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16110de3651cca---bujisani.pdfIn PDF document text
    • http://www.hj-bouwt.be/wp-content/plugins/formcraft/file-upload/server/content/files/160c0ce69d8dbd---xizepojijisolebuvaxaji.pdfIn PDF document text
    • https://olgunbey.com/upload/ckfinder/files/51373984641.pdfIn PDF document text
    • http://manpukuorder.com/uploads/files/supusisosawel.pdfIn PDF document text
    • http://uptownfallschurch.com/uploads/files/dirutepadebesimelasuw.pdfIn PDF document text
    • http://marcobernini.it/userfiles/files/33967533428.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=alfawise+u30+pro+manualPDF 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_off0000f699.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF699 19708 bytes
SHA-256: 8c3cdcfc858004c2d8ca6f74b47da47ab1242d2e1999c0211509eb07392e2e08
font_01_sfnt_off0001296a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1296A 10884 bytes
SHA-256: a1b62d65354619b4727083bf75bd5b8e3c2b9b9486cf5907cac143522e5d4282
font_02_sfnt_off000142a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x142A2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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