Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec49eca71238cc67…

MALICIOUS

PDF

85.4 KB Created: 2021-09-13 20:23:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: d54971ed2a19042862bcd8123465c0ab SHA-1: d4166429353c378e1dfe5aa1ec2119c789df2122 SHA-256: ec49eca71238cc676b78b80607bc166534a61758058a6481a1a55fb536c9eefb
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document exhibits characteristics of a phishing or malware distribution lure, as indicated by the 'ML_NYX_PDF_MALICIOUS' and 'CLAMAV_DETECTION' heuristics. It contains numerous embedded URLs and a deceptive 'SE_DOWNLOAD_BUTTON' heuristic, suggesting an attempt to trick users into downloading malicious content. The presence of external URIs and a link farm further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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
  • 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://pixomot.ru/uplcv?utm_term=farmville+2+mod+apk+download PDF link annotation
    • https://absoluteanytime.com/media_file/files/files/29131214345.pdfIn PDF document text
    • http://dennehylaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/negekesedeluburekonuzef.pdfIn PDF document text
    • http://biznesfishki.ru/files/userfiles/files/votumawumomatudagi.pdfIn PDF document text
    • http://deeringbayrealestate.com/userfiles/files/54447292219.pdfIn PDF document text
    • http://pattarasawat.com/ckfinder/userfiles/files/40960218254.pdfIn PDF document text
    • https://siyata.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/16134788541151---13649511960.pdfIn PDF document text
    • http://dermatologomiguelgallego.com/miguel/fck/file/megurozanurozasog.pdfIn PDF document text
    • https://ksboutlet.com/file/files/99900124314.pdfIn PDF document text
    • http://webinaris.net/ckfinder/userfiles/publics/files/83997163567.pdfIn PDF document text
    • http://sns-russia.ru/userfiles/file/54620850783.pdfIn PDF document text
    • https://sofahatinh.com/upload/files/95682973235.pdfIn PDF document text
    • http://arebiatours.com/uploads/files/61545636901.pdfIn PDF document text
    • http://agataklimowska.pl/userfiles/file/58151212188.pdfIn PDF document text
    • http://solemarservizi.it/userfiles/files/58278729282.pdfIn PDF document text
    • https://qeyeoptical.com/ckeditor/ckfinder/userfiles/files/96754157163.pdfIn PDF document text
    • https://detskeihriska.eu/ckfinder/userfiles/files/52605352288.pdfIn PDF document text
    • https://agencement-menuiserie-var.fr/stockages/files/rigawufuvemoberotoxije.pdfIn PDF document text
    • https://camelcarpet.org/d/files/nadituzidasaxetojuwa.pdfIn PDF document text
    • http://designbyjoseph.com/uploads/File/40877748740.pdfIn PDF document text
    • http://biosystech.com/pdsFck/file/86733417120.pdfIn PDF document text
    • http://tnslib.net/userfiles/files/juzesipunezixumavapaxiz.pdfIn PDF document text
    • http://karthikeyanjayaram.in/userfiles/file/lixosepamul.pdfIn PDF document text
    • http://bouwbedrijfbouwheer.nl/userfiles/file/mowuxopijuritivoropan.pdfIn PDF document text
    • http://seghers.kr/data/editor/file/15330783986138a1ffbaab3.pdfIn PDF document text
    • http://xn--82ca1bkibi6eufn5bh1b7i3e.com/UserFiles/File/vesirumufepuvifasafidik.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_off0000e6d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6D1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fee3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEE3 18916 bytes
SHA-256: e12aadc458dc6fecf6777086166f3d3e877a95192da325a9ddb78b6949ebb48c
font_02_sfnt_off00012f9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F9D 10628 bytes
SHA-256: 0115336b81255cdc123fca7ed4464dce9e73b15236d5f4039bd053b98fa1b94b