Malicious PDF — malware analysis report

Static analysis result for SHA-256 6fd2f15ed0f97dd9…

MALICIOUS

PDF

70.6 KB Created: 2021-09-10 04:19:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 160aa051201734e11d35d2471ba0a83d SHA-1: 859f9169713cc3c4198c40293ca2eff4e637afab SHA-256: 6fd2f15ed0f97dd93cb633abd49162280fb145681b4127f3e96dff6473d15d77
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to other PDF files, indicating a link farm or redirection scheme. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly suggests this behavior. ClamAV detection as 'Pdf.Phishing.Trojan' further supports a malicious intent, likely phishing or malware delivery. No scripts were extracted, but the overall structure and URL patterns are indicative of a malicious document designed to lure users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

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 http://taispacedesign.com/upload/files/jaxorad.pdf In PDF document text
    • https://ekselantechnology.solutions/ckfinder/userfiles/files/78691587609.pdfIn PDF document text
    • https://burstallconrad.com/editor_files/file/64951778545.pdfIn PDF document text
    • http://bargiel.com.pl/ckfinder/userfiles/files/vugopejabifibikukir.pdfIn PDF document text
    • https://www.hkha.org/ckfinder/userfiles/files/zavum.pdfIn PDF document text
    • http://dent-pro.cz/pic/file/42334050086.pdfIn PDF document text
    • https://thaiwoodengames.com/files/upload/files/85717376029.pdfIn PDF document text
    • https://viktorina.ledoritulys.lt/files/rowuni.pdfIn PDF document text
    • http://atlonnuri.org/UpLoadImage/editer/files/61684207248.pdfIn PDF document text
    • http://tareeapartment.com/user_img/files/15051498436.pdfIn PDF document text
    • http://bjerkelunden.org/content/files/userfiles/file///nemogewutunikunolepasewu.pdfIn PDF document text
    • http://kaies.net/upfiles/210904074944992386w2np50.pdfIn PDF document text
    • http://salsainkonstanz.de/media/files/jared.pdfIn PDF document text
    • https://www.educationsexuelle-ecole.ch/ck/ckfinder/userfiles/files/95865121913.pdfIn PDF document text
    • http://jmvlpslimited.com/ci/userfiles/files/godeditag.pdfIn PDF document text
    • http://playitdirect.ca/ckfinder/uploadfiles/files/52226795924.pdfIn PDF document text
    • https://www.idromeccanicasrl.com/idromeccanicasrl.com/wp-content/plugins/super-forms/uploads/php/files/68e4aeee0fb39ae155e18d2a726f2a26/4795326786.pdfIn PDF document text
    • http://anneadamslaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/sawedozutorenojexiw.pdfIn PDF document text
    • https://turismopontevedra.com/ckfinder/userfiles/files/72146583206.pdfIn PDF document text
    • http://inggeo.eu/userfiles/files/33735865231.pdfIn PDF document text
    • https://proektasis.gr/admin/spaw2/uploads/files/20827032630.pdfIn PDF document text
    • http://consorzio-csa.it/userfiles/files/90312560849.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=elite+killer+swat+apkPDF 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_off0000b46c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB46C 16348 bytes
SHA-256: 49c8d0a75dfdbea8a1d5498fbd7bd374a5026e756ae9be36b15d84abe3dddcce
font_01_sfnt_off0000de1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE1B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f632.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF632 10180 bytes
SHA-256: 9168cf39fa1098ab0beea54144b320031bd5898511048133311f46d12567bd3c

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