Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e086fc92d82acb9…

MALICIOUS

PDF

80.1 KB Created: 2021-09-11 16:54:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: c0e9627d866cbb344eb39e4a430e4ae0 SHA-1: d3ebfccf2232f248710bb9a5a3e6bf787d2a73c6 SHA-256: 2e086fc92d82acb93f48b084ebf3c7ccfae0ad459a4f4369fca42d7cc5c33865
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 phishing or trojan payload. It contains a link farm pointing to multiple compromised websites, likely serving as a distribution point for further malicious content. The presence of external URIs and link farms suggests an attempt to redirect users to malicious sites, potentially for credential harvesting or malware download.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9833

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 http://dekobonner.de/userfiles/file/61451689956.pdf
    • https://bizdrive.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/16134fd09698b6---boxifegobamulabi.pdf
    • https://markmont.eu/editor_uploads/system/files/dowaz.pdf
    • https://www.sacict.or.th/ckfinder/userfiles/files/58907687008.pdf
    • https://limpjet.com.br/wp-content/plugins/super-forms/uploads/php/files/848c1296c4e10f672691f3088130edb8/15309869007.pdf
    • https://e-room.co/userfiles/file/muvituviluwubasot.pdf
    • http://www.mvdisposal.com/wp-content/plugins/formcraft/file-upload/server/content/files/16133b718ee586---musiravamogumomogu.pdf
    • https://rivieresoceanie.com/ckfinder/userfiles/files/jidalizoverarudaverasa.pdf
    • https://optimustelecoms.com/ckfinder/userfiles/files/pedipinolorekadigope.pdf
    • http://swhos.com/upload/files/85793819474.pdf
    • http://dental-forum.ru/userfiles/file/zusomapuwas.pdf
    • http://gabinetpro.gabinetpro.pl/kosmetyczka/krakow/files/bimaruja.pdf
    • http://exmar.it/foto_fck/file/zumoxew.pdf
    • https://gestionarival.com/userfiles/file/65172246458.pdf
    • http://erpsamik.com/ckfinder/userfiles/files/terukosuvarujojudidebuk.pdf
    • https://chiuman-hk.com/images/file/wixarobesaxuzow.pdf
    • http://autosoftware.company/autoresponders_images/files/dofosawuwufamalu.pdf
    • http://igs.compcierge-asia.com/ckfinder/userfiles/files/55142741310.pdf
    • http://ottotech.center/userfiles/file/pokokibepodu.pdf
    • http://freemansphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/16138f1067207c---pesijijonijevedono.pdf
    • http://keramann.ru/uploads/files/zibobisalopevegujomuwizo.pdf
    • http://www.alwaysflorida.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613422e3d8b39---44095579820.pdf
    • https://cakkue.com/contents/files/22884234737.pdf
    • https://auf.vn/wp-content/plugins/super-forms/uploads/php/files/cictc8p30k3q1eacou0qvaoij6/13436135078.pdf
    • http://textingrights.com/userfiles/files/sedip.pdf
    • http://exosportsante.fr/ckfinder/userfiles/files/54245955078.pdf
    • https://retentionstudentexperience.com/wp-content/plugins/formcraft/file-upload/server/content/files/16132df26e6a79---82298917074.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=fast+and+furious+8+yts+torrent
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d31f.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xD31F 16792 bytes
font_01_sfnt_off0000eb36.bin
47f0e49c5f42e725279f1fbe671949f90712d3de0ff7f1e6cfccec78aff352e3
pdf-font-stream PDF embedded font (sfnt) at offset 0xEB36 10700 bytes
font_02_sfnt_off000103eb.bin
87ddbda0ac73da9e1c4a51be70b7e38a95c7004b51908d16ecefde5e6d072f2b
pdf-font-stream PDF embedded font (sfnt) at offset 0x103EB 18224 bytes