Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b6638948d86751b…

MALICIOUS

PDF

87.9 KB Created: 2021-07-26 21:25:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 6af6d2ff26465e7a99bad7b4f23f4b0b SHA-1: 519354ae5e53c836cd0b9c10ebd8b39de02c3d2c SHA-256: 0b6638948d86751bc18d8e10780194a35cb4ebdaca025b6189913d3d5d5f752f
156 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier as malicious. It contains numerous embedded URLs, many of which point to compromised CMS upload storage or disposable hosting, suggesting a link farm designed to redirect users to malicious sites. The document body is heavily obfuscated and does not provide clear textual lures, but the overall structure and URL distribution strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://egyptsuntours.com/userfiles/files/48164583764.pdf In PDF document text
    • http://www.tsssport.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077419154fe4---lajepisanup.pdfIn PDF document text
    • http://piazzademarini3ge.com/userfiles/files/motixivufowunozasul.pdfIn PDF document text
    • http://coopmong.com/ckupload/files/36419690551.pdfIn PDF document text
    • http://change4best.ru/upload/file/sosomodukarejeta.pdfIn PDF document text
    • http://dearbornshs70reunion.com/clients/c/c6/c6cacd1d9512a3effe7244eb89d69e0e/File/gurowoxotigepulijulokaguk.pdfIn PDF document text
    • https://www.capitalroofingct.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b2b46cb5194---kixaku.pdfIn PDF document text
    • https://stpeterscbs.ca/ckfinder/userfiles/files/48485300019.pdfIn PDF document text
    • https://albawadiroad.com/userfiles/files/43757392213.pdfIn PDF document text
    • http://mensagemcrista.com.br/ckfinder/userfiles/files/darasadu.pdfIn PDF document text
    • http://morard-mcf.fr/data/Files/10336367448.pdfIn PDF document text
    • http://www.driftime.ee/wp-content/plugins/formcraft/file-upload/server/content/files/16075f6136072b---gesatigefukiremi.pdfIn PDF document text
    • http://delannahotel.com/user_img/file/12975769791.pdfIn PDF document text
    • https://www.sacproblemleri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c1d56d207a0---67903293581.pdfIn PDF document text
    • https://chicagoportablexray.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b4c3055ae90---rifigikime.pdfIn PDF document text
    • https://jaunimodienos.lt/wp-content/plugins/super-forms/uploads/php/files/eh3vaqoiabpfbnmaggctfj9s9m/20812217643.pdfIn PDF document text
    • http://sunnysideclassof64.com/clients/a/ac/acc4ccb49d7935ca36198347b895393e/File/50844867056.pdfIn PDF document text
    • https://room12shio4.com/contents//files/nubupitibonofoxikefo.pdfIn PDF document text
    • http://www.dj-csnl.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1609271348e41c---dolutopowenawodo.pdfIn PDF document text
    • https://wsbtitan.com/images/file/7297635983.pdfIn PDF document text
    • http://grupogmec.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac80ab0ff54---9499451506.pdfIn PDF document text
    • https://www.3dreamchurch.com/wp-content/plugins/super-forms/uploads/php/files/9087f6f982e12431b73607ce0970fbed/tarerij.pdfIn PDF document text
    • https://otdelkamos.ru/wp-content/plugins/super-forms/uploads/php/files/dd743891a048ebaba07830418c452d0a/20328582100.pdfIn PDF document text
    • https://www.colline-eternelle.com/ckfinder/userfiles/files/nexusasebuxemilebodebexe.pdfIn PDF document text
    • http://sieckultury.pl/wp-content/plugins/super-forms/uploads/php/files/eccb3c64be4ae6f261b7a17eb60fa9b9/80361018280.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=are+onn+tvs+good+for+gamingPDF 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_off0000f26f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF26F 10700 bytes
SHA-256: 47a09b9af56847dbc64e24078e56e0c8d3f2a846213719e56fd08a1787afe29a
font_01_sfnt_off00010ad3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AD3 17824 bytes
SHA-256: e1c5da2fd9e8d7878ff7cb296f2d7691c0ab33307e2093a99fcb026c36349a5a
font_02_sfnt_off000139c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x139C4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1