Malicious PDF — malware analysis report

Static analysis result for SHA-256 49e5c15a97a28b68…

MALICIOUS

PDF

81.6 KB Created: 2021-09-17 09:28:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: babdc50f5f19d87f25f15c22d219d08e SHA-1: 59a8dd14d8efbb5289d24328dcb537ddc6ec142d SHA-256: 49e5c15a97a28b68354435aedaaf04733039291a9c3721d465b44f0d05c2fd9f
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The file contains numerous embedded URLs, many of which point to suspicious PDF files on various domains, suggesting a link farm or redirection mechanism. The presence of these links indicates an attempt to direct the user to external, potentially malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 5

  • 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.
  • 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://soudurelauziere.com/upload/editor/file/xonegedilupumoxawifodapir.pdf In PDF document text
    • http://ecovn.vn/uploads/news_file/28036997569.pdfIn PDF document text
    • http://debschoen.com/userfiles/file/vukov.pdfIn PDF document text
    • http://klpa.net/userData/board/file/sewidugazasivajew.pdfIn PDF document text
    • http://fujiya-burbank.com/uploads/files/40581458631.pdfIn PDF document text
    • http://felixefontesadvogados.com.br/ckfinder/userfiles/files/15858986693.pdfIn PDF document text
    • http://heilpraxis-pankow.de/wp-content/plugins/formcraft/file-upload/server/content/files/161353a54eb717---kopifefuziwu.pdfIn PDF document text
    • http://www.jasolasia.com/image/upload/File/97506797747.pdfIn PDF document text
    • https://inclinedigital.com/wp-content/plugins/formcraft/file-upload/server/content/files/16134b837e9c81---rarifajo.pdfIn PDF document text
    • https://morganmethod.tuesdaytrader.com/ci/userfiles/files/wopop.pdfIn PDF document text
    • https://whitesal.com/data/images/file/7287_20210916125724.pdfIn PDF document text
    • http://hai-bi.com/uploads/files/202109011315483304.pdfIn PDF document text
    • http://wawa757.com/uploads/files/82031059391.pdfIn PDF document text
    • http://universalestetic.com/userfiles/file/78897796528.pdfIn PDF document text
    • http://www.heatandgas.com/EditorImages/file/83606089827.pdfIn PDF document text
    • https://bistakalikotenetwork.com/userfiles/file/vawopujilamokaliwekexu.pdfIn PDF document text
    • http://neuchina.org/userfiles/file/vasudevobenijije.pdfIn PDF document text
    • http://xn--80aaaaadfwa5aftjhxrkcrg8iwc.xn--p1ai/pict/file/90527985575.pdfIn PDF document text
    • http://onsijsselstein.nl/userfiles/files/92088707316.pdfIn PDF document text
    • http://gibisch.org/files/files/73520839329.pdfIn PDF document text
    • http://splhardware.com/UploadFile/file/2021091600460273499.pdfIn PDF document text
    • http://lpc2529.com/piceditor/file/pazorevubenozufufepamoba.pdfIn PDF document text
    • https://hattoco.vn/images/ckeditor/files/degikidukifikate.pdfIn PDF document text
    • http://likebarcode.com/image/files/20210915_091900.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=how+to+uninstall+latest+android+updatePDF link annotation
    • 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_off0000d8ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8AD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f0bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0BF 18256 bytes
SHA-256: 90bd109bec6eb7b20f37e0e788527eb1f4125756e69c44f4a46aa889bb2460e0
font_02_sfnt_off0001203d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1203D 10564 bytes
SHA-256: 96fe7098c96fa51c12f8106892d11dca79a2f43b6eab136185dba2b29fa6b35f

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