Malicious PDF — malware analysis report

Static analysis result for SHA-256 ccee6514e1fdad0f…

MALICIOUS

PDF

80.0 KB Created: 2021-09-16 12:58:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: d5969310b775b10693e34a2c1bfd9aac SHA-1: 6d7c4b5ffe0213b9145c1307916498190a014d88 SHA-256: ccee6514e1fdad0f80079fd6b36b1fd3d278df56d65d41c00fde67fb11c8e68b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, containing numerous URLs pointing to compromised websites, likely to lure users into downloading further malware or submitting sensitive information. The presence of external URIs and link farm heuristics strongly suggests a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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://garglob.ru/uplcv?utm_term=no+chat+heads+facebook+messenger+android PDF link annotation
    • http://www.lauricedale.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16134a0411ead9---31386714274.pdfIn PDF document text
    • https://www.3dreamchurch.com/wp-content/plugins/super-forms/uploads/php/files/b4c02a3692c498ac9993e0a504280d9e/66053214776.pdfIn PDF document text
    • https://flcevent.fcu.edu.tw/plugin/ce1/ckfinder/userfiles/files/20210906012445.pdfIn PDF document text
    • https://taucaotoccatba.vn/images/news/files/tasegibowubijotar.pdfIn PDF document text
    • http://tongrentangthai.com/UserFiles/file/74847068948.pdfIn PDF document text
    • https://mkontakt.pl/dat/file/lutajobiba.pdfIn PDF document text
    • http://emusicmarket.com/upfile/board/files/65136676798.pdfIn PDF document text
    • http://doubler-son-capital.com/photos/files/sejipizirudulaxamisa.pdfIn PDF document text
    • http://www.moyekolodin.com/files/9399730107.pdfIn PDF document text
    • http://inlikeflintlogistics.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613c4b8d0a23b---pirotajoti.pdfIn PDF document text
    • http://linza-market.ru/upload/files/banibogarisunopekotabade.pdfIn PDF document text
    • http://tyros-club.de/userfiles/file/14927855750.pdfIn PDF document text
    • https://elegune.net/files/galeria/files/79988646966.pdfIn PDF document text
    • https://thieumaunao.vn/workspace/develop/uploads/ck_upload/files/duwazezujodasonalubi.pdfIn PDF document text
    • http://bradzo-ep.com/uploads/files/72104031258.pdfIn PDF document text
    • https://nsck-cykelmotion.dk/userfiles/file/rilapojojolupoxuwinub.pdfIn PDF document text
    • http://instant-image.net/UserFiles/Site/File/37807879895.pdfIn PDF document text
    • https://gretajensen.com/ckfinder/userfiles/files/bupiparipeben.pdfIn PDF document text
    • https://olamare.com/img/uploaded/file/kigubisigeder.pdfIn PDF document text
    • https://cowichanmusicfestival.com/userfiles/file/buxabopusetok.pdfIn PDF document text
    • https://vrindaindia.com/php/joseph/uploads/file/bokana.pdfIn PDF document text
    • https://inchiriereelicopterromania.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16133492fbe472---56614608900.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_off0000d17b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD17B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e98d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE98D 18356 bytes
SHA-256: cb3c0fe2edf1fdbfad2cf90661bd0796e48e9c938358d90fc052580ae514c88e
font_02_sfnt_off00011905.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11905 11084 bytes
SHA-256: 9b624035b43a5874e085b4e07580612307f170a5c7d4094c00892d6107e29435