Malicious PDF — malware analysis report

Static analysis result for SHA-256 d00199a632ff3f7a…

MALICIOUS

PDF

83.9 KB Created: 2021-09-13 22:54:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 00b470e8dc21f01f58f04dade61f9824 SHA-1: 1915262ae0754f344775789a88b45a5b0757c0c5 SHA-256: d00199a632ff3f7a55e35401b4d81da232f9ca6ef4724fbe89ade12d851358f7
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The sample was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URLs, with one heuristic specifically identifying it as a link farm on disposable hosting. This suggests the document's primary purpose is to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://www.shipsupply.co.mz/wp-content/plugins/formcraft/file-upload/server/content/files/1612f4be2d48f8---96198835010.pdf In PDF document text
    • http://indago-rovigo.it/userfiles/files/72184923430.pdfIn PDF document text
    • https://moulindelarroque.com/userfiles/file/lerupexoguzuzobubu.pdfIn PDF document text
    • http://seanbittinger.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/88032467765.pdfIn PDF document text
    • http://maxbrio.kr/files/files/48648129531.pdfIn PDF document text
    • https://bucatariizidite.ro/printuri-fi/files/8021511929.pdfIn PDF document text
    • http://xhzhengli.com/upload/liririjisenikoser.pdfIn PDF document text
    • http://joyear.com/ckfinder/userfiles/files/89454256725.pdfIn PDF document text
    • https://resulgame.com/calisma2/files/uploads/wilunu.pdfIn PDF document text
    • http://friulanapanini.com/images/file/gujanowegolurawidowid.pdfIn PDF document text
    • http://mp-journal.com/media/file/bebebimozuvu.pdfIn PDF document text
    • http://mediedil.eu/userfiles/files/xilanagajalunanaruvafifi.pdfIn PDF document text
    • https://weldingportal.it/userfiles/file/43259138506.pdfIn PDF document text
    • http://xn--djr00fsyfv0o5qgy9u.net/filespath/files/20210902091246.pdfIn PDF document text
    • http://lynhuagiasi.com/Images_upload/files/kibebejaxo.pdfIn PDF document text
    • http://mentor-tutor.com/newGroserLikeProject/uploads/files/94520987874.pdfIn PDF document text
    • https://anandalaya.in/resources/file/bukibi.pdfIn PDF document text
    • http://tostonet.cl/ckfinder/userfiles/files/48640469591.pdfIn PDF document text
    • http://halvani.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613767f2b426d---38051768550.pdfIn PDF document text
    • https://vibangthuaphatlai.net/uploads/files/fokedeniziwawuzupedoxovi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=material+dark+theme+androidPDF 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_off0000e18f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE18F 19128 bytes
SHA-256: 961fe5979a191e11d36d9b88a5a45078e8594a261e91895307294cf95bfb5980
font_01_sfnt_off0001133c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1133C 10428 bytes
SHA-256: 0afcdeaeb8bd99ef9c41e1453dcb2826e494b08f0816cb9dfff9e6705841a7ed
font_02_sfnt_off00012aa4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12AA4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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