Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd0f3b696ae33fa2…

MALICIOUS

PDF

73.5 KB Created: 2021-09-09 00:04:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-18
MD5: af842d3d64fdf5b2f58a24986089abba SHA-1: cc7393a5b70010d7d965ed6333481752f838f44a SHA-256: bd0f3b696ae33fa2cfa4ebb28cdfff0a1b81d851ad4e84897e1144ab16c4a2e9
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and contains embedded JavaScript. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://bjerkelunden.org/content/files/userfiles/file///medozugofevulujedimuz.pdf In PDF document text
    • http://langfordfinancialservices.com/userfiles/files/wipesegobopogax.pdfIn PDF document text
    • https://kalashad.com/userfiles/file/zurajapuwufa.pdfIn PDF document text
    • http://5mal4.de/moneyvidya/web/images/userfiles/file/fipavizutasik.pdfIn PDF document text
    • http://inventory-acepipe.com/images/uploads/files/22812039583.pdfIn PDF document text
    • http://www.prodomasa.com/ckfinder/userfiles/files/kubijaxawurujuvomopo.pdfIn PDF document text
    • http://tekizolasyon.com/ckfinder/userfiles/files/37367988948.pdfIn PDF document text
    • http://onfireinteriors.com/userfiles/43370624424.pdfIn PDF document text
    • http://c-amc.com/upload/files/donelonopisuzixomawa.pdfIn PDF document text
    • http://babyindex.nl/images/uploads/94510241110.pdfIn PDF document text
    • https://mygoaltv.org/ipp/images/uploads/files/95361746863.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/161310196a79f4---88363154450.pdfIn PDF document text
    • http://novaserv.com/wp-content/plugins/formcraft/file-upload/server/content/files/16133270e90112---zadonijetikit.pdfIn PDF document text
    • http://trungtamsangloc.vn/uploads/ck_upload/files/20624004194.pdfIn PDF document text
    • http://smart.sut.ac.th/tsme/src/lib/ckfinder/userfiles/files/fuwetu.pdfIn PDF document text
    • http://fecirturizm.com/resimler/files/kiviresuxinamur.pdfIn PDF document text
    • http://kencert.vn/uploads/image/files/56677568236.pdfIn PDF document text
    • http://tarnava.eu/user_images/file/jezunurawugenusilusijip.pdfIn PDF document text
    • http://cuacuonductudong.com/upload/files/6900302495.pdfIn PDF document text
    • http://sun-marche.com/app/webroot/js/ckfinder/userfiles/files/rurenabeku.pdfIn PDF document text
    • http://banlinhkienlaptop.com/userfiles/file/somit.pdfIn PDF document text
    • https://www.hotelrestaurantmacarena.fr/ckfinder/userfiles/files/xudagakusipowozewikajudiz.pdfIn PDF document text
    • https://mongolia-volkslift.com/uploads/files/5388345515.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=best+galaxy+note+drawing+appPDF 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_off0000bc82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBC82 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d499.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD499 10924 bytes
SHA-256: ecb3039b2337bc609a852782d0b849427c81dbe676a541c5e8e686bf7f480dc0
font_02_sfnt_off0000edee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDEE 16524 bytes
SHA-256: 1ea8cc704efa6915797ccb68bf06709e2619d26918997470d192ae859fcac5c0

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