Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5cb0516d5826d49…

MALICIOUS

PDF

80.1 KB Created: 2021-09-01 20:35:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: ca879eaade630f7c0996af9152f37acf SHA-1: cb5b6f27d868e68998043f5abc2593b7a37c624c SHA-256: e5cb0516d5826d4957695e917690b8e7111289f49adf1ac1e5dbdb7242040eb7
156 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm, with many URLs pointing to compromised WordPress upload storage and disposable hosting. These links likely lead to phishing pages or further malware downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://inchiriereelicopterromania.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160822df3a8b88---93384487926.pdf In PDF document text
    • https://balance-global.com/wp-content/plugins/super-forms/uploads/php/files/934otpdh8ji8j4ka95jtkk17he/sivuzivodafomirimino.pdfIn PDF document text
    • http://easternsheep.by/app/upload/file/85082042286.pdfIn PDF document text
    • http://wanyuantemple.tw/userfiles/file/dobuniwapininamikomoti.pdfIn PDF document text
    • https://trucraftsmanship.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096562bb6786---vofodu.pdfIn PDF document text
    • https://lorenzonimmigrationlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c9ab8d71d92---91243708141.pdfIn PDF document text
    • https://www.3dreamchurch.com/wp-content/plugins/super-forms/uploads/php/files/d1d9756c70986ba16319d39ce36658c2/zisugerexi.pdfIn PDF document text
    • https://daleplumbinginc.com/wp-content/plugins/super-forms/uploads/php/files/e7b7fd2770da0a0d4442fc26c6888892/4416233811.pdfIn PDF document text
    • http://quangphong.vn/uploads/image/files/11515211207.pdfIn PDF document text
    • https://drnanemilk.com/tctt/sites/aaa/file/48962823333.pdfIn PDF document text
    • https://www.accidentinjurylascruces.com/wp-content/plugins/super-forms/uploads/php/files/oebuo72ekm8epf9176e3196frj/nefasejarobuwemefuna.pdfIn PDF document text
    • http://tandartsindex.nl/images/uploads/daxesaxewinefodiru.pdfIn PDF document text
    • https://law.com.sg/wp-content/plugins/super-forms/uploads/php/files/4f7b2ecf9ff178c00580901335bf45c9/26088512178.pdfIn PDF document text
    • http://www.ibadirect.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f97f4d53ab---barik.pdfIn PDF document text
    • http://commsoft.nu/demo/ktb/wsmbilder/files/vawidawozig.pdfIn PDF document text
    • https://tiguan-wiki.ru/file/vuvodujironiwazuzoregoweg.pdfIn PDF document text
    • http://southfieldhigh1973.com/clients/2/27/27a5067865c8334ad4a5a1fd7642c928/File/gasaxuxavefobisekox.pdfIn PDF document text
    • http://brodart01.com/wp-content/plugins/super-forms/uploads/php/files/875vunh8u1ec0n8jccgkromsri/kunesiwutuvoxuvegimodimu.pdfIn PDF document text
    • http://foire-fromages-et-vins.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c534966755b---89232690818.pdfIn PDF document text
    • https://angkorphotographyguide.com/userfiles/file/gamidifaluteloredagedale.pdfIn PDF document text
    • https://ahha.az/userfiles/file/33398921255.pdfIn PDF document text
    • http://admio.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160ff3a1998639---famogineromapuvobatanagi.pdfIn PDF document text
    • https://dubigroup.com/admin/fckeditor/editor/filemanager/connectors/upload/file/57636836525.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=5+elements+named+after+scientistsPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d3cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3CD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ebe4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBE4 10552 bytes
SHA-256: 71154d2f761e5440b47e2c43024d5ac8c9ce641dc7d438a46a031ea9e1703c0e
font_02_sfnt_off000103df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103DF 18024 bytes
SHA-256: ebf769147aa947151b37945bc59c9161fcad97f24024e247d9b11e9815d97da6

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