Malicious PDF — malware analysis report

Static analysis result for SHA-256 52252dd54e81e540…

MALICIOUS

PDF

78.9 KB Created: 2021-09-04 23:04:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 2ac7e4307dcb494ec767aa6171435e12 SHA-1: 844a3f789202924611ff0c5576e426e6432c6617 SHA-256: 52252dd54e81e5402911237a517a73bd7a9d0dbd374fe9084790aa9e132eae68
164 Risk Score

Malware Insights

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

This PDF file was detected as a phishing trojan by ClamAV. It contains numerous links to external URLs hosted on compromised WordPress sites, suggesting an attempt to distribute malicious content or redirect users to phishing pages. The presence of PDF_RANDOM_URL_LINK and PDF_SEO_DISPOSABLE_LINK_FARM heuristics indicates a pattern of using these compromised sites for hosting malicious files.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3497

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 to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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
  • 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://crysiq.ru/uplcv?utm_term=agricultura+de+subsistencia+em+mocambique+pdf PDF link annotation
    • https://www.ergunaygoren.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c7c48a051e---dexekurexaxoge.pdfIn PDF document text
    • https://zold-kommando.hu/files/tevedagafarovoki.pdfIn PDF document text
    • https://www.dazzlingdecor.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1613057b971651---zewalezamu.pdfIn PDF document text
    • http://n2nnetworks.com/files/others/lubokepaxowijemaru.pdfIn PDF document text
    • https://jodhpurtravels.com/nbloom/fckuploads/file/kabenitugedafirubogoke.pdfIn PDF document text
    • https://vannordenvastgoed.nl/userfiles/file/9578012665.pdfIn PDF document text
    • https://barcelonacentremedic.cat/files/galeria/files/sijixebededo.pdfIn PDF document text
    • https://artofsurfing.com/preview/ckfinder/userfiles/files/71761577446.pdfIn PDF document text
    • http://unewstoday.com/task/userimages/file/wezijafatoj.pdfIn PDF document text
    • http://magnachip.cn/userfiles/file/20210516183706.pdfIn PDF document text
    • http://upoart.com/ckfinder/userfiles/files/dizefuvunuxiwifam.pdfIn PDF document text
    • https://bilbox.es/wp-content/plugins/super-forms/uploads/php/files/49dfc7da34c596564acd9ecfeecd60e1/lizaxovowegijinaxaxujo.pdfIn PDF document text
    • https://advancedbusiness.co/wp-content/plugins/super-forms/uploads/php/files/96686ba198f238bebbe0864b13c5c7db/zuzulewogipufizefu.pdfIn PDF document text
    • https://www.nrlandscapes.co.uk/wp-content/plugins/super-forms/uploads/php/files/df179ffb130d7e9a9fbad7efccea7ba1/voromawavadozisebeve.pdfIn PDF document text
    • https://festivalecolo.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1609b7d4f9fda1---9429842867.pdfIn PDF document text
    • https://www.heracles-hotel.eu/wp-content/plugins/super-forms/uploads/php/files/sbindeimb3td1sp148lttgdc6v/11992391265.pdfIn PDF document text
    • https://nceptionsolutions.com/wp-content/plugins/super-forms/uploads/php/files/4261ec07e1ab6886b60412cd253297d2/dobasu.pdfIn PDF document text
    • http://www.restorationservice.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16079ffa3a81b8---xatufuxamugetagofunivu.pdfIn PDF document text
    • http://www.catalogodecineargentino.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e4a90a6fcc---ripexekegufodifebe.pdfIn PDF document text
    • http://www.sunarnuricomuisvealisverismerkezi.com/wp-content/plugins/super-forms/uploads/php/files/h2t475tatf7piu8m4pblkqc1t1/melaxenudivanugero.pdfIn PDF document text
    • http://tnshoppingbag.com/upfiles/file/64078926308.pdfIn PDF document text
    • https://www.bouldersudbury.org/wp-content/plugins/formcraft/file-upload/server/content/files/16074d89489187---18257714944.pdfIn PDF document text
    • http://www.restorationservice.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160a2f2c5b0f20---kewukaruwogox.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e81d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE81D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001002f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1002F 20148 bytes
SHA-256: 81ec5e382fd367b91df52068fa6fbeb7ca45dfe738904dcddbe913e548a19709

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