Malicious PDF — malware analysis report

Static analysis result for SHA-256 0baa75f343ff2eca…

MALICIOUS

PDF

85.5 KB Created: 2021-09-14 08:13:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: cf4807be82c436ab19556c5c776d1018 SHA-1: 1d1fb9625ddbe2960290f9c060015069492d9aeb SHA-256: 0baa75f343ff2eca015a882bc04c08d4387f646839e251ef8a44367b4721a36d
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, a common technique for executing malicious code within documents. The heuristic firings and numerous external URLs suggest this PDF is designed to redirect users to potentially harmful websites, likely for phishing or to download further malware. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

Heuristics 6

  • 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.
  • 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 https://archism.ru/uplcv?utm_term=cloning+app+for+android+phone PDF link annotation
    • https://mimpiindah2.com/contents/files/xesoxoruxadupuxiremeke.pdfIn PDF document text
    • http://www.ih-consultant.com/ckfinder/userfiles/files/gukivuwepogike.pdfIn PDF document text
    • https://pakianco.ir/data/image/uploads/news/files/simusivesifek.pdfIn PDF document text
    • https://shevtsov-art.com/uploads/files/48361015965.pdfIn PDF document text
    • http://sprinter-lab.ru/content/File/96791579416.pdfIn PDF document text
    • http://xn----9sbkvfu2aex3d.xn--p1ai/ckfinder/userfiles/files/daxuru.pdfIn PDF document text
    • http://ahkjt.com/upfile/file/gutaworuni.pdfIn PDF document text
    • http://ptaki.info/imgekoprojekty/files/89789771090.pdfIn PDF document text
    • http://machi-tomo.xyz/js/ckfinder/userfiles/files/16826191396.pdfIn PDF document text
    • https://blv.by/upload/editor/files/27105156753.pdfIn PDF document text
    • http://logistra.fr/ressource/site-image/files/sefikitaje.pdfIn PDF document text
    • http://belovosushi.ru/files/54067600113.pdfIn PDF document text
    • http://bahtiyardishekimi.com/fckfiles/file/70492320428.pdfIn PDF document text
    • http://cafegreenwichvillage.com/uploads/files/parobi.pdfIn PDF document text
    • https://mission4recruitment.com/wp-content/plugins/formcraft/file-upload/server/content/files/16134995f105c3---80618495048.pdfIn PDF document text
    • http://cleanyachts.it/writable/public/userfiles/file/86978637172.pdfIn PDF document text
    • https://china-glass-mosaic.com/userfiles/files/20210902_075331.pdfIn PDF document text
    • http://at2apigroup3.com/contents/files/mubinuxogimu.pdfIn PDF document text
    • http://hytechcommunications.com/userfiles/file/golaxukubif.pdfIn PDF document text
    • http://oumkua.com/userfiles/file/71055614285.pdfIn PDF document text
    • https://idroilektriki.gr/files/file/sujabemejafabixe.pdfIn PDF document text
    • http://sz-nuoyi.com/Upload/file/2021091409213579705.pdfIn PDF document text
    • http://raffaelecavazzoni.com/userfiles/files/71477167386.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_off0000eb18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB18 18076 bytes
SHA-256: 5a02a9c10c0995a25f4fdf892697df904f094356c52103d765cda87426660ee7
font_01_sfnt_off00011a35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A35 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001324c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1324C 10540 bytes
SHA-256: 964e1861537b23be54e8e6c62c31453c5bf0e0ece410a59beac67224029745a3

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