Malicious PDF — malware analysis report

Static analysis result for SHA-256 c145c7e684601122…

MALICIOUS

PDF

72.2 KB Created: 2021-06-27 22:50:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 3cebc5d6acdbb3c895a5b91fe1edf3b5 SHA-1: 97446cba73ba3f822687b3468267e95fa2f9da9c SHA-256: c145c7e68460112270c5824634f8c8255291f1ce8ec8679c7e7d21b0fab7d535
156 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. Heuristics indicate the document contains a link farm pointing to multiple compromised CMS upload storage locations and disposable hosting. The embedded URLs suggest an attempt to redirect users to malicious sites for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://orkhaconstruction.com/wp-content/plugins/super-forms/uploads/php/files/3783v8igdjj9p3ncvlkhpqso1m/juduxufutonivazuwubavuwif.pdf In PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b15bc77dbc---15154107682.pdfIn PDF document text
    • https://gyandeepjkss.org/userfiles/file/11385669894.pdfIn PDF document text
    • http://czdashan.cn/uploadfile/file/2021050304474273499.pdfIn PDF document text
    • https://action-roofing.com/wp-content/plugins/super-forms/uploads/php/files/3ab324aeb2f0de173bd251431bdb6b1c/51924872113.pdfIn PDF document text
    • https://levin-dent.ru/wp-content/plugins/super-forms/uploads/php/files/9f3d264d2589e08d85d5b74ef447dd4e/23883014821.pdfIn PDF document text
    • https://schmitz.cz/res/file/68199815614.pdfIn PDF document text
    • http://terapie-psi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16090b5856d4a5---19575409594.pdfIn PDF document text
    • https://www.euroservicemilano.it/wp-content/plugins/formcraft/file-upload/server/content/files/160c4a4e49c5c9---53969407830.pdfIn PDF document text
    • http://vasilii-orlov.fun/wp-content/plugins/super-forms/uploads/php/files/936b0c6508a0a9957e9949a23c8e5050/30331040149.pdfIn PDF document text
    • http://www.tif.cn/wp-content/plugins/super-forms/uploads/php/files/h66huuim3rhof3gg7ifkjhtq55/30488517545.pdfIn PDF document text
    • https://www.olympusnorge.no/wp-content/plugins/super-forms/uploads/php/files/440mc6svupo1aaq0sk192taahc/85669373371.pdfIn PDF document text
    • https://www.ndgai.com/wp-content/plugins/super-forms/uploads/php/files/mirnb6b8ftpisvmj6q08ae2hiq/lemikowerulamaji.pdfIn PDF document text
    • https://247hvac.ca/fabulous1/uploads/files/mupuresusuj.pdfIn PDF document text
    • http://maidichike.com/upload/files/48911184384.pdfIn PDF document text
    • https://dolnoslaskialarmsmogowy.pl/imgturysta/files/46723168364.pdfIn PDF document text
    • http://m4klynchburg.org/clients/3/34/34420611de4c9c7593cf5e5fe12de6df/File/fowalidazerabavevapur.pdfIn PDF document text
    • https://beaufortbond.com/wp-content/plugins/super-forms/uploads/php/files/423056187b7637ee3927ddf227602aa0/zokajaxediwu.pdfIn PDF document text
    • https://aimara-bg.com/userfiles/file/18435733518.pdfIn PDF document text
    • http://aeskulap24h.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b6c752659d0---kobititaduti.pdfIn PDF document text
    • https://www.ferienhof-schneider.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a99f8648534---9343200350.pdfIn PDF document text
    • http://cngwalk.com/fckeditor/userfiles/image/demufojejivajulabinani.pdfIn PDF document text
    • http://melissajacksonmd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160767f220d250---dimejeruxugusilajatipijuv.pdfIn PDF document text
    • https://globalmediaminds.com/uploads/files/koleduzoxizajobikifot.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=how+to+join+two+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_off0000bcd3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBCD3 10092 bytes
SHA-256: fbcd21174a64125dc1378b4770534ebb3e2ade3bff87537365def29758f15d45
font_01_sfnt_off0000d355.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD355 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000eb67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB67 15700 bytes
SHA-256: 849705781d38601d5a2a59281ceb674147f893feb951984e5a0b941e4d9d8a2f

Open this report in the interactive analyzer, or submit your own file for analysis.