Malicious PDF — malware analysis report

Static analysis result for SHA-256 ecb8bf6299375749…

MALICIOUS

PDF

92.8 KB Created: 2021-07-29 18:49:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: a400b09a9eec10420b05e42277285fd0 SHA-1: d79185f19e852b44bb2949193180e461205b8afd SHA-256: ecb8bf6299375749cf4117a566362d3a329aacf1fb75dbbd9dca4fc68f4efa36
164 Risk Score

Malware Insights

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

The PDF document exhibits characteristics of a phishing lure, indicated by the presence of numerous external links, many hosted on compromised or disposable domains, and a heuristic flagging a visual download button. The ML classifier strongly suggests malicious intent, and ClamAV detection confirms this, identifying it as a phishing trojan. While no scripts were extracted, the overall structure and URL distribution point towards an attempt to trick users into downloading malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://nomylo.ru/uplcv?utm_term=free+download+adobe+illustrator+cs5+crack+keygen PDF link annotation
    • https://laihouston.com/wp-content/plugins/super-forms/uploads/php/files/eee9e02e54b8c549df8c64e9f9adea2d/91521442429.pdfIn PDF document text
    • https://photographerin.agency/wp-content/plugins/super-forms/uploads/php/files/3uict7v9kof7df976h30pqic67/lasurabasodirinitokexox.pdfIn PDF document text
    • http://jjinline.org/file_upload/file/wuxikis.pdfIn PDF document text
    • https://progin.swiss/ckfinder/userfiles/files/vufexalavasukojipidubiber.pdfIn PDF document text
    • https://wccia-vastu.com/wp-content/plugins/super-forms/uploads/php/files/5c263f00a69ba6ab98e640ad8b515373/63785247184.pdfIn PDF document text
    • https://leicht-spb.ru/wp-content/plugins/super-forms/uploads/php/files/88ea137de1f1b98db97bf35a64d5f5cc/81446295256.pdfIn PDF document text
    • http://mijneigenlift.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160de783c54998---66615728561.pdfIn PDF document text
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/780a22d1b91de8d0898245c7fe320599/207225321.pdfIn PDF document text
    • http://beetsom.com/PROGRAM_FCKeditor_UserFiles/file/164621762860ae032a1f578.pdfIn PDF document text
    • http://urbancollab.com/userfiles/Proj_Name//files/71072387254.pdfIn PDF document text
    • https://agenciaboom.com/wp-content/plugins/super-forms/uploads/php/files/h5ha1cungovsa6uiq9l5hpdv87/45000904937.pdfIn PDF document text
    • https://pabausa.org/wp-content/plugins/formcraft/file-upload/server/content/files/160cecb6ba3d48---vedoja.pdfIn PDF document text
    • https://www.chesapeake-lighting.com/wp-content/plugins/super-forms/uploads/php/files/1921b50f02206c3456bd5a1f5f155287/48911788209.pdfIn PDF document text
    • http://xn----8sbpvg0afdbe.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/sj511n2ih1kncqfd6i5fkjs2c3/gutodofijoxexo.pdfIn PDF document text
    • http://drwatsonsr.com/clients/2/2b/2b9a0cf27321ceab3a47fbd10bf94d34/File/15657783916.pdfIn PDF document text
    • http://gilleyfamilyreunion.com/clients/6/6c/6ce887ac6ce8bbcacf46524318b1f362/File/67463966153.pdfIn PDF document text
    • https://cosalesrep.com/wp-content/plugins/super-forms/uploads/php/files/3fbc032cd0d46d7126186e4c5a8e6059/39141179088.pdfIn PDF document text
    • https://shining4u.com/wp-content/plugins/super-forms/uploads/php/files/9ce7182eb0c57a1e32c2ba01f51c9fa5/kapumefup.pdfIn PDF document text
    • https://paloaltospeakerseries.com/wp-content/plugins/super-forms/uploads/php/files/727b02040aba58435960f134d7479eb3/kefogozadakarinuvig.pdfIn PDF document text
    • https://betonwerkendejonge.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608fe8879e547---vuduximulemovi.pdfIn PDF document text
    • https://www.caesarstravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f1a024315fc---xitatapaguja.pdfIn PDF document text
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/0r2htp2t47mlprkmctcm7bpboe/siluxabogadi.pdfIn PDF document text
    • https://ghnservizi.com/file/12905607153.pdfIn PDF document text
    • https://soltendance.com/stockages/files/28411126877.pdfIn PDF document text
    • 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_off000103ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103EF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011c01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C01 17732 bytes
SHA-256: 1609cd5654e989b4a5ebff44309bf09f2a6ea55c2edfade51ed79c30b1b7c5b1
font_02_sfnt_off000149aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x149AA 11188 bytes
SHA-256: a62fc8fa58da4ce3d4768017bef565d0f2830532137105a606cd9e46203859e7

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