Malicious PDF — malware analysis report

Static analysis result for SHA-256 07b2671c02b6dad0…

MALICIOUS

PDF

83.4 KB Created: 2021-09-07 12:27:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 08551a4f032234c2b5c0493f10e5af7c SHA-1: 70a2c48eb90490b31bcdef222fddecc2faf37320 SHA-256: 07b2671c02b6dad0ee54b8620de1d357e48bb2356a1347ea7985fb9937dc6c21
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating it likely exploits a vulnerability or contains malicious links. The document functions as a link farm, with numerous URLs pointing to potentially compromised domains or disposable hosting, suggesting an attempt to redirect users to malicious sites or for SEO manipulation. No scripts were extracted, but the presence of multiple external URIs and the 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic strongly suggest a phishing or content-luring attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://x-software.cz/data/file/tutumimizujimufunud.pdf In PDF document text
    • https://alate.org/admin/fckeditor/editorfile/jifileresapowedemet.pdfIn PDF document text
    • http://donleroy.net/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/99412189831.pdfIn PDF document text
    • http://pvsystexperts.com/wp-content/plugins/super-forms/uploads/php/files/h84gl5jou6e5qt8aba06mdiqh1/35039438672.pdfIn PDF document text
    • http://jrpst.pl/userfiles/file/22731315088.pdfIn PDF document text
    • http://wernitznigg.at/files/xojalupifis.pdfIn PDF document text
    • http://soles2walk.cz/data/file/42038719271.pdfIn PDF document text
    • http://eraucheta.ru/uploads/file/pozejamefadolo.pdfIn PDF document text
    • https://alamansyria.com/userfiles/file/44786185499.pdfIn PDF document text
    • http://philippinesroadshow.com/wp-content/plugins/super-forms/uploads/php/files/c3fb360f842f791946ee18a8b89567cc/doloxe.pdfIn PDF document text
    • http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/vdpumkgd3q1357al2abe1iphc2/gusetuweboravusifotidafu.pdfIn PDF document text
    • https://global-brand.net/userfiles/files/15650461532.pdfIn PDF document text
    • https://www.hediyevideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160eca7da68e38---43572665096.pdfIn PDF document text
    • https://master.plus/wp-content/plugins/super-forms/uploads/php/files/fc14e4c81a7d552e256037db3afde335/37701841615.pdfIn PDF document text
    • http://dokumsuzgec.com/userfiles/files/57911804853.pdfIn PDF document text
    • http://atol-res.pl/uploads/file/wegitofifitemime.pdfIn PDF document text
    • https://assurancemauricie.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ee633ce9af---52303964955.pdfIn PDF document text
    • http://pvsystexperts.com/wp-content/plugins/super-forms/uploads/php/files/mkvg3g30hn8opqin6va1a6s7e7/40719316407.pdfIn PDF document text
    • http://taeguektour.com/FileData/ckfinder/files/20210806_A4316BAB60F36F73.pdfIn PDF document text
    • https://printsolutions.ro/uploads/wysiwyg/files/8284642873.pdfIn PDF document text
    • http://aktifbant.com/resimler/files/7683829323.pdfIn PDF document text
    • https://masukpt2.com/contents//files/xodakuve.pdfIn PDF document text
    • http://informerfitness.com/wp-content/plugins/super-forms/uploads/php/files/3e46fd09584f8f79fec71ed9c295f9f2/71202597062.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=hernia+hiatal+gigante+pdfPDF 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_off0000df1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF1E 19272 bytes
SHA-256: 4922dc66cd36a11d7c5e1188822cb1ec1425cdcf70c13e0e3fa27be813827365
font_01_sfnt_off000110f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110F8 10480 bytes
SHA-256: 622d8b97df1cbafcc5e0dade452bcc3d9c5592f4d79640fad61e477526bd89cb
font_02_sfnt_off00012866.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12866 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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