Malicious PDF — malware analysis report

Static analysis result for SHA-256 e48a3f039b4f77ab…

MALICIOUS

PDF

133.2 KB Created: 2021-07-22 05:03:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: df96e393fea2f36e5f9d5debe3fd21f3 SHA-1: 07aceb1c69c0dec484af311b15f91816795448bc SHA-256: e48a3f039b4f77ab1f41acdd515629ea11518791eeceefc50373bc60e2c3df19
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF was identified as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. It contains numerous embedded URLs that point to compromised WordPress upload directories, suggesting a link farm designed to redirect users to malicious content. The presence of multiple compromised CMS upload links indicates a coordinated effort to host malicious files.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7398

Heuristics 5

  • 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
  • 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://amesmedicalservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609accd5950de---jomebeno.pdf In PDF document text
    • http://www.teeintact.com/admin/fckeditor/editor/filemanager/connectors/php/img/file/mopevinovada.pdfIn PDF document text
    • http://www.christinemartin.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16083f0eca4f85---kamofolitixezunixade.pdfIn PDF document text
    • https://www.lowdoc-loans.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160dee690da905---33788739970.pdfIn PDF document text
    • https://www.varishastalari.com/wp-content/plugins/formcraft/file-upload/server/content/files/160799a65c0d4d---1668295008.pdfIn PDF document text
    • https://www.hagensmarketing.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072b20855d02---12831913498.pdfIn PDF document text
    • https://www.chauffeur-prive-nice.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16079b377f107d---43817932221.pdfIn PDF document text
    • https://avenue102.com/uploads/file/75231041951.pdfIn PDF document text
    • https://ajwatravel.com/wheelmarine/userfiles/file/dusodaruxoteberorowudukax.pdfIn PDF document text
    • http://www.skup.it/wp-content/plugins/formcraft/file-upload/server/content/files/160863b5b16b3a---totalitepitas.pdfIn PDF document text
    • http://www.itbaloch.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e8b7675f03---42097633306.pdfIn PDF document text
    • http://www.phonefixcomo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c2986d286cc---59263880198.pdfIn PDF document text
    • https://tort-art.ru/userfiles/file/88713498689.pdfIn PDF document text
    • https://bursakaynak.com/userfiles/file/kopovegarove.pdfIn PDF document text
    • https://bnbcostaverde.it/userfiles/file/warupowebomodigumozok.pdfIn PDF document text
    • http://beepost.vn/upload/userfiles/files/nozidu.pdfIn PDF document text
    • http://geose.ru/userfiles/file/duzenuj.pdfIn PDF document text
    • http://intechsol.kz/wp-content/plugins/formcraft/file-upload/server/content/files/1609b85d440984---6665474520.pdfIn PDF document text
    • https://calldidocta.com/wp-content/plugins/super-forms/uploads/php/files/59c7bed4e224fbf2b6c574a3dbe9c083/safosa.pdfIn PDF document text
    • https://detectiveoffice.net/userfiles/file/terileruxorobunolilutupew.pdfIn PDF document text
    • https://asset-books.com/userfiles/file/91337290340.pdfIn PDF document text
    • https://lostsoulsmemorialnj.org/wp-content/plugins/super-forms/uploads/php/files/6c0dcbbe7c5fe378ea7cfbc60228d4f2/60282852564.pdfIn PDF document text
    • https://forex-robo.org/wp-content/plugins/super-forms/uploads/php/files/900baa35f66e0237a36c0cda2eb9ce6d/71260806724.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=narshe+mines+mapPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00019302.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19302 12172 bytes
SHA-256: cbd69a61ed507030e0097cd043e82e2e54d1a1055321cc945023bd6b0923ac93
font_01_sfnt_off0001ba73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1BA73 18504 bytes
SHA-256: 6192e73b2791db6d5f85b57d8a990c3fafec06937dd56cfcb4fe4839be659a06
font_02_sfnt_off0001ea7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1EA7C 10232 bytes
SHA-256: 27ba489130e096b2246476fdd77c6faa4c42c27883c6d73ca3e84ba4912510ae
font_03_sfnt_off00020134.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x20134 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1