Malicious PDF — malware analysis report

Static analysis result for SHA-256 abda262ed801d7f4…

MALICIOUS

PDF

83.8 KB Created: 2021-09-05 13:56:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 95e985df1c69b069442e603a9c39eed8 SHA-1: 7cdbca4cb41004a9dd6e34cc9d49e83e86af2786 SHA-256: abda262ed801d7f41a191c5c142d12bd7e1e482ae8f6409a05d533f57c01ba37
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to numerous domains, many of which are hosted on compromised WordPress sites. The presence of URLs like 'https://inwebjor.ru/uplcv?utm_term=solid+converter+pdf+download+crack' suggests a phishing or scam lure, aiming to trick users into downloading further malware or revealing sensitive information. No scripts were extracted, but the extensive use of external links points to a redirection-based attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://inwebjor.ru/uplcv?utm_term=solid+converter+pdf+download+crack PDF link annotation
    • https://earthchartercities.org/wp-content/plugins/formcraft/file-upload/server/content/files/160bd6fa780c32---mizujeve.pdfIn PDF document text
    • http://www.lightingandhvacexpo.com/wp-content/plugins/super-forms/uploads/php/files/3257184022f52426a1cf2232ef3c17ff/ladam.pdfIn PDF document text
    • https://leicht-spb.ru/wp-content/plugins/super-forms/uploads/php/files/9ad32aa8bf9c86a228ceeea056dff4c6/zogenunerorujudedefa.pdfIn PDF document text
    • http://extreamtuning.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1607a67eedb45e---vugajamuziwiwemog.pdfIn PDF document text
    • https://earthchartercities.org/wp-content/plugins/formcraft/file-upload/server/content/files/1606d0db606dd1---wipiwimu.pdfIn PDF document text
    • https://fiambreszav.com/wp-content/plugins/super-forms/uploads/php/files/c74090e1bb6053477c80a110f0bbdc51/mevurenivomemaveribex.pdfIn PDF document text
    • http://dvg.asia/ckfinder/uploadfiles/files/10018775340.pdfIn PDF document text
    • https://eatorhours.org/e-bussiness/fckimages/file/85907027916.pdfIn PDF document text
    • http://wenxuezj.com/images/File/mimugejales.pdfIn PDF document text
    • http://puzynowska-kancelaria.com/userfiles/file/52632138229.pdfIn PDF document text
    • http://www.k-24.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ed0ca2b8ed---kifotexogidelomebulesameb.pdfIn PDF document text
    • https://www.sidertest.it/wp-content/plugins/formcraft/file-upload/server/content/files/160c8bec95d265---zukokudusipozumapa.pdfIn PDF document text
    • http://debandhelder.nl/ckfinder/userfiles/files/37054416231.pdfIn PDF document text
    • http://sts-logistika.ru/wp-content/plugins/super-forms/uploads/php/files/e57c3fe2d5f434fc23c08f86bec716f6/mateguregoxevewop.pdfIn PDF document text
    • http://dlt-nkp.com/fileupload//file/tofinosojotap.pdfIn PDF document text
    • https://elicopter-de-inchiriat.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160974a09001b4---37974876515.pdfIn PDF document text
    • https://loctra.net/userfiles/file/ziwedawezamijiguvuwuri.pdfIn PDF document text
    • http://www.look4job.gr/images/_user_na/file/gizeloxujakar.pdfIn PDF document text
    • https://barcelonacentremedic.cat/files/galeria/files/99947946366.pdfIn PDF document text
    • http://nhadatv.com/webroot/img/files/77433486865.pdfIn PDF document text
    • https://savitravel.ro/ckfinder/userfiles/files/vifitasijomakasirigasa.pdfIn PDF document text
    • https://detector-billetes.com/Imagenes/file/94071774444.pdfIn PDF document text
    • http://www.scmphotography.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160c952bae7079---duresejilij.pdfIn PDF document text
    • http://hong-tour.com/FileData/ckfinder/files/20210720_EE289A66520B3789.pdfIn PDF document text
    • http://flexicourse.cz/res/file/89953568236.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_off0000e1c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1C9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f9e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9E0 10764 bytes
SHA-256: 392723b8e18528286cfb27a37828ef460858c6493e4e72b91a66f20528771e51
font_02_sfnt_off000112d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112D4 18072 bytes
SHA-256: 8f531d2ec6290010f30ff6536918c7374846d0cac80c616bdd1df379713c7061

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