Malicious PDF — malware analysis report

Static analysis result for SHA-256 03a067547c74aa6e…

MALICIOUS

PDF

78.3 KB Created: 2021-09-18 06:29:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: a49e444e6b4d8257f51d8d99fd7dd010 SHA-1: 499e85912fa440b4f6383392a70fd20a317957d8 SHA-256: 03a067547c74aa6e7368bd66b3a10cf6ae106f662f3602fb40f3541316f0f5cd
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The document contains numerous embedded URLs, many of which are part of a link farm hosted on disposable domains, suggesting a phishing or malware distribution attempt. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://philabc.ru/uplcv?utm_term=noizz+download+apk PDF link annotation
    • http://ipea.kr/userData/board/file/24528204273.pdfIn PDF document text
    • http://langeline.com/ckeditor/upload/files/50132079674.pdfIn PDF document text
    • https://lolakarimova.uz/ckfinder/userfiles/files/napamulumaj.pdfIn PDF document text
    • https://smgbid.com/ckfinder_userfiles/files/1765818394.pdfIn PDF document text
    • http://ncdesign.it/userfiles/files/tudop.pdfIn PDF document text
    • http://arredamenticucinesiciliane.it/userfiles/files/woponobawuxelawa.pdfIn PDF document text
    • http://www.cenlaenvironmental.com/siteuploads/editorimg/file/2556715856.pdfIn PDF document text
    • http://engcaphone.com/_UploadFile/Images/file/11013128311.pdfIn PDF document text
    • https://pieseautocomenzi.ro/userfiles/file/movuzewezizuf.pdfIn PDF document text
    • http://uitvaartverzorgingsindex.nl/images/uploads/41005631311.pdfIn PDF document text
    • http://4els.ru/uploads/images/files/88523056006.pdfIn PDF document text
    • https://shevtsov-art.com/uploads/files/xenibomesulu.pdfIn PDF document text
    • http://techcessgroups.com/userfiles/file/gazilidirazakamukabukaset.pdfIn PDF document text
    • http://caribsplash.org/wp-content/plugins/formcraft/file-upload/server/content/files/1613ad66d634be---mugotomodowuwig.pdfIn PDF document text
    • http://kaies.net/upfiles/2109092020375015700ta87f.pdfIn PDF document text
    • https://bangprice.com/bangprice.com/beta/cms_image/file/luguretopazidotavumibiv.pdfIn PDF document text
    • http://gcsiva.com/files/userfiles/file/jaloxefopofojidepoxe.pdfIn PDF document text
    • http://www.alexgis.com/siteuploads/editorimg/file/gejadufobalaxedaje.pdfIn PDF document text
    • https://vyrukrc.lt/userfiles/file/vutoro.pdfIn PDF document text
    • https://estudiowebcolombia.com/ckfinder/userfiles/files/62924590523.pdfIn PDF document text
    • https://podereilmontaleo.it/writable/public/userfiles/file/podorupe.pdfIn PDF document text
    • http://jedzenie365.pl/ckfinder/userfiles/files/tozaviki.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_off0000cf8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF8B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e79d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE79D 17868 bytes
SHA-256: d175d2991f90bd81b47192c9fcb07d5ba2f9a1a556e6dddb1930bdc2649cb5a0
font_02_sfnt_off0001159b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1159B 10100 bytes
SHA-256: 98ed40282c0c8d95e34dd63184e5b9ea32b8ce3af751150aecab78d45a939a67

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