Malicious PDF — malware analysis report

Static analysis result for SHA-256 8af93ac2465b4979…

MALICIOUS

PDF

80.0 KB Created: 2021-09-16 20:09:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 363fef190fb27e26448e2e0401e9aa3d SHA-1: 3af8003f04eb733f78a6b663ebf2d0ae2fcf5e36 SHA-256: 8af93ac2465b49790db6b045f7855672e32615bbe7632a44ed98e5ad2bf0bef9
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external sites, many hosted on disposable domains or compromised CMS uploads, suggesting a link farm for phishing or malware distribution. The 'SE_PASSWORD_ARCHIVE_LURE' heuristic indicates the document likely instructs the user to open a password-protected archive, a common tactic to bypass gateway scanning. ClamAV also detected this as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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=como+achar+um+android+roubado PDF link annotation
    • http://reklamavysocina.cz/UserFiles/File/vedokuwopuno.pdfIn PDF document text
    • https://www.bouldersudbury.org/wp-content/plugins/formcraft/file-upload/server/content/files/16133612fe0933---47743168764.pdfIn PDF document text
    • http://hzdsbg.cn/uploadfile/1630792488.pdfIn PDF document text
    • https://promise-land.com/upload/file/gatuxugek.pdfIn PDF document text
    • http://tyros-club.de/userfiles/file/zonexoxet.pdfIn PDF document text
    • http://fu-xin.tw/uploads/files/202109141217041523.pdfIn PDF document text
    • https://hebatkeren88.com/contents/files/77219011938.pdfIn PDF document text
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/ra6u0ng3o0qjg8mlhi40fukb55/19889138624.pdfIn PDF document text
    • http://efrex.cz/files/file/46143913599.pdfIn PDF document text
    • https://floridagreatescape.com/media/file/wiwularupekelorudovo.pdfIn PDF document text
    • http://klick-tipp.info/ckfinder/userfiles/publics/files/toxofekevepidolafutose.pdfIn PDF document text
    • http://jamoncup.es/wp-content/plugins/formcraft/file-upload/server/content/files/161433dca523cd---vuterevepen.pdfIn PDF document text
    • https://dptech.vn/uploads/files/25298794249.pdfIn PDF document text
    • https://www.chinacimctrailer.com/wp-content/plugins/super-forms/uploads/php/files/8a883f3d5b4d8fd310f7424cad77ce4a/63114962927.pdfIn PDF document text
    • http://cbcom.fr/ressource/site-image/files/97836974787.pdfIn PDF document text
    • https://ddmmaze.altruistictech.org/documents/img/upload/files/51095621305.pdfIn PDF document text
    • http://files.ibiza-ferien.de/file/27238910074.pdfIn PDF document text
    • http://monteconsultants.com/image/upload/File/35897236519.pdfIn PDF document text
    • https://0924055971.com/uploads/files/202109090401482647.pdfIn PDF document text
    • https://takarasushimn.com/userfiles/files/53983357906.pdfIn PDF document text
    • http://trustarshida.co/cache/fck_files/file/26829969201.pdfIn PDF document text
    • https://bjjewels.net/nbloom/fckuploads/file/pezedipufapilepazavow.pdfIn PDF document text
    • http://forter.vn/hinhanh/file/30237743765.pdfIn PDF document text
    • http://pro.ovh.net/~tribuene/images/banque/file/69023644432.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_off0000d0c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0C5 19840 bytes
SHA-256: c5e3af773b2037de1836fb1cad17c7261b770ec00295f59fddcdae402a7ee82e
font_01_sfnt_off00010174.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10174 10464 bytes
SHA-256: 7b4de15d20f836ab3c9136686b3e03c1708413108a252b0afdbea2c8f26e3dc3
font_02_sfnt_off000118f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118F0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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