Malicious PDF — malware analysis report

Static analysis result for SHA-256 0df9f8ad627c33c6…

MALICIOUS

PDF

81.9 KB Created: 2021-09-16 12:44:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: c7aca67ff725bfb76344bec8a1449242 SHA-1: 6d8f791bf9e5dbe0e34f94ca155f350f43b2f95e SHA-256: 0df9f8ad627c33c677a50686aef38a7f9ce851dcbc4c0c7b46a4250f3317451f
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged by ClamAV as a phishing trojan and by a machine learning model as malicious. It contains a large number of embedded URLs pointing to various domains, indicating a likely attempt to redirect users to malicious sites for phishing or malware delivery. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic further supports this by identifying the document as a link farm on disposable hosting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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 https://smidgel.ru/uplcv?utm_term=blush+pink+house+bloxburg PDF link annotation
    • http://bridgestone-ice-cruiser-7000.ru/ckfinder/userfiles/files/12932108748.pdfIn PDF document text
    • https://feniks9.ru/ckfinder/userfiles/files/11779740503.pdfIn PDF document text
    • http://tsnpharma.com/upload/files/konomoronepoxadakedekono.pdfIn PDF document text
    • http://teamwork-poetschke.com/ckfinder/userfiles/files/lozevatalapiw.pdfIn PDF document text
    • http://xn----7sbbgprpk7biiq.xn--p1ai/admin/ckfinder/userfiles/files/33835798716.pdfIn PDF document text
    • https://kozlovka.mebel18.com/uploads/files/gixenajexavuwopuveginuzix.pdfIn PDF document text
    • http://infrabud.eu/fckpliki/file/36015719256.pdfIn PDF document text
    • http://global-leasing-management.com/uf/file/24417740180.pdfIn PDF document text
    • http://cpghollywood.com/userfiles/files/lugesinuxutu.pdfIn PDF document text
    • http://kiko168.com/UploadFile/file/20210916135239945.pdfIn PDF document text
    • http://byty-pardubice.eu/UserFiles/File/pedubikuposobiwode.pdfIn PDF document text
    • http://xsjsbzrw.com/uploads/files/69722712428.pdfIn PDF document text
    • http://lalitas-thaimassage-spa.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613138f0156a8---dizuzesudibasulij.pdfIn PDF document text
    • https://mimpiindah2.com/contents/files/nuvododujulajodepofu.pdfIn PDF document text
    • http://dinskayarealty.ru/media/file/71368929721.pdfIn PDF document text
    • http://studiorumeo.it/userfiles/files/fitajenirubomuwaperolaru.pdfIn PDF document text
    • https://www.hospedeagora.com.br/wp-content/plugins/super-forms/uploads/php/files/sq1581r4gh1j93eie5bvviof5c/30697062608.pdfIn PDF document text
    • http://bapassamarinda.id/assets/ckfinder/core/connector/php/uploads/files/tufolebiforijezijuzezo.pdfIn PDF document text
    • https://nada70.org/userfiles/file/pumibipufepuf.pdfIn PDF document text
    • http://thaoduocvn.com/userfiles/image/file/43507951865.pdfIn PDF document text
    • https://tcremich.lu/files/files/zejesetobo.pdfIn PDF document text
    • http://drsuthichai.com/userfiles/files/52639668000.pdfIn PDF document text
    • http://sunwisechem.com/Uploadfiles/files/63282677835.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_off0000dfa2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFA2 16340 bytes
SHA-256: 660eb8cd1d39079fcb869fb7bc9f297a78838cfa4a0314a103a4f9a6f0eedb8e
font_01_sfnt_off00010961.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10961 10756 bytes
SHA-256: e4520f05b46d971975518f19012e60e5480b8dd3036ab36d4acc1c89339d22f2
font_02_sfnt_off000121dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121DC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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