Malicious PDF — malware analysis report

Static analysis result for SHA-256 be30f91b3313bc1b…

MALICIOUS

PDF

82.2 KB Created: 2021-09-19 12:08:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 56e1397327a851292858b9cc15464e75 SHA-1: 222c6fe84a76ab3a55509a87e1b185612f3a2a1f SHA-256: be30f91b3313bc1bef66295f9c823e4bba6d1c469aabdfecb19a138ddc53f832
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to suspicious domains and are flagged as part of a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. While no scripts were directly extracted, the PDF structure and URL distribution suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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 http://xn--12cmi2byac9cdhd0hra6d7bxkwbgj1gch.com/user_img/files/sapibamu.pdf In PDF document text
    • http://pincailight.com/zk/UploadFile/file/2021090606502173499.pdfIn PDF document text
    • http://fabriziocar.it/userfiles/files/94942648755.pdfIn PDF document text
    • https://confidence-ist.com/ckfinder/userfiles/files/91731681196.pdfIn PDF document text
    • http://moriefrusca.com/userfiles/files/judode.pdfIn PDF document text
    • http://yule-sign.com/upload/editor/file/20210913140438.pdfIn PDF document text
    • http://zdrowejaja.com/Upload/file/22815356530.pdfIn PDF document text
    • http://tw-tms.com/uploadpic/xw/files/mipuregudoxitejolulej.pdfIn PDF document text
    • http://pokewaveanaheim.com/uploads/files/33561425802.pdfIn PDF document text
    • https://equator-maritime.com/userfiles/file/59592129532.pdfIn PDF document text
    • http://www.orarestauratorisaf.it/wp-content/plugins/formcraft/file-upload/server/content/files/1613d01e84f7a1---67188846583.pdfIn PDF document text
    • https://ojazzdance.fr/userfiles/file/56077130878.pdfIn PDF document text
    • http://addon-colsman.somantec.net/ckfinder/userfiles/files/genoxegamo.pdfIn PDF document text
    • http://faptvmedia.com/userfiles/file/57065483655.pdfIn PDF document text
    • https://mytekas.com/UserFiles/file/fejogosus.pdfIn PDF document text
    • http://diversecityuk.com/userfiles/file/90123792932.pdfIn PDF document text
    • https://un7un9b3rl1pa7-99.com/contents/files/77881543218.pdfIn PDF document text
    • http://ckm-machinery.com/userfiles/files/61028182117.pdfIn PDF document text
    • http://evrokomplekt.ru/userfiles/file/wubusodiwubu.pdfIn PDF document text
    • http://mercuresamuichaweng.com/admin/file/25884389867.pdfIn PDF document text
    • https://www.mclarenpress.com/wp-content/plugins/formcraft/file-upload/server/content/files/161388e70d31a4---levimow.pdfIn PDF document text
    • http://polymer-optix.de/userfiles/file/tonovelamifazuzofasiw.pdfIn PDF document text
    • http://www.galiantsolutions.com/emailimages/file/wesipisekarim.pdfIn PDF document text
    • http://jshanwoo.com/ckfinder/userfiles/files/molulirufipitodewiwut.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=solarmovie+free+movies+sitePDF 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_off0000db9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB9F 10412 bytes
SHA-256: fb8632e5a1540a41cb59aeffb3346ca22668710a73324605fcaa96d7e4a4b8de
font_01_sfnt_off0000f33b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF33B 18404 bytes
SHA-256: 8024a7160ac8ef46357c55c36d765d8e03a4a5907d5837f76d63593254ec0c57
font_02_sfnt_off00012209.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12209 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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