Malicious PDF — malware analysis report

Static analysis result for SHA-256 54e11594525b67ba…

MALICIOUS

PDF

74.0 KB Created: 2021-09-06 05:31:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 7eafe044ad0ea667fbe632d86dcc89b5 SHA-1: d7d62e61531bf7dd9d832b0ef6474fbf0c4d0748 SHA-256: 54e11594525b67ba73061147c09093f04b555c20b4cc8aae730b4c671c2dc12e
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to distribute malicious content or phish users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware delivery via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9939

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 http://lncxjzxxw.com/upload_fck/file/2021-6-29/20210629085340673253.pdf In PDF document text
    • http://donahoelawfirm.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/44541069407.pdfIn PDF document text
    • https://ag-concept.ru/wp-content/plugins/super-forms/uploads/php/files/7e924b723071fb02903cb0a3c89a008a/zozavosoximara.pdfIn PDF document text
    • https://www.fmworks.com.tr/wp-content/plugins/super-forms/uploads/php/files/7l3ukuqer9kqn3rmoqvhgtsu68/xaxukaxafibinij.pdfIn PDF document text
    • http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/l3eq355h3ikhmhlccsgtis8h75/fexujok.pdfIn PDF document text
    • http://ediljolli.com/userfiles/files/32526698588.pdfIn PDF document text
    • http://phanphoiongnhuahoasen.vn/upload/files/54081829067.pdfIn PDF document text
    • http://zartmobilia.com/userfiles/file/20210902025753.pdfIn PDF document text
    • https://mymovingestimate.com/wp-content/plugins/super-forms/uploads/php/files/f62a263157cc334238c4a53fbd74077d/56158084181.pdfIn PDF document text
    • http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/m6jbh6ur48uu2d341uqj8af5o6/97208810160.pdfIn PDF document text
    • http://shsuorui.com/uploadfiles/fckeditor/20210629/file/16249529184866.pdfIn PDF document text
    • https://mikepromedia.com/wp-content/plugins/super-forms/uploads/php/files/ed3ca1c8dfd41b344173a369131a0bf2/54918361539.pdfIn PDF document text
    • https://irantruck.ir/data/file/42644045806.pdfIn PDF document text
    • https://zionapostolicministries.org/uploads/file/kexozovegugarojo.pdfIn PDF document text
    • http://ecolservizinettuno.com/userfiles/files/63219093296.pdfIn PDF document text
    • http://onnetsolution.in/userfiles/file/konufagujobunotovejonu.pdfIn PDF document text
    • http://israel-aliya.com/wp-content/plugins/super-forms/uploads/php/files/20241d5c9a5000abfa92479264d3a684/48959340982.pdfIn PDF document text
    • http://adams-gold.ru/archive/image/file/40814548344.pdfIn PDF document text
    • https://galerie-louise.be/userfiles/files/26287111731.pdfIn PDF document text
    • http://fw-simple.com/uploads/files/lirafefaruzu.pdfIn PDF document text
    • https://vinisfarm.com/wp-content/plugins/super-forms/uploads/php/files/29c3aaad87186eedac7b6050342252e1/76848974068.pdfIn PDF document text
    • https://automatisme-portail-bordazzi.fr/fichiers/zowigutuluzuxakogalaj.pdfIn PDF document text
    • https://cradlegold.com/wp-content/plugins/super-forms/uploads/php/files/huo4g5rnnrbqla9vrr68lagb5u/18947355688.pdfIn PDF document text
    • https://ms02bet.net/contents//files/mekolesiwakotagizimil.pdfIn PDF document text
    • http://boki.hu/editor_up/49482064563.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f35265d4159---fawazudonemare.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=dayton+drill+press+parts+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_off0000bdd3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBDD3 10768 bytes
SHA-256: 69f6ed5cbe02a7d1b1cba10e854fdb91e974138fa537bfa92eaf05c0f925d282
font_01_sfnt_off0000d698.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD698 16684 bytes
SHA-256: ca38ede8dcb3556ec8faa2aadc27773bf8613fe703bcf8b5e0d1500e28c170f3
font_02_sfnt_off00010246.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10246 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1