Malicious PDF — malware analysis report

Static analysis result for SHA-256 f056cdf25c892889…

MALICIOUS

PDF

71.8 KB Created: 2021-09-12 13:23:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-01
MD5: 682ef229c9e7de2d269dfcba96bd1577 SHA-1: cd755d4c6241982d5c2a2212f729b249b4fe5a30 SHA-256: f056cdf25c892889724cc4d96df4f057c3cc00d786d9157d49c40a31ce9ed5b4
126 Risk Score

Malware Insights

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

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. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://shopexpert.com/app/webroot/files/userfiles/files/96420806101.pdf In PDF document text
    • http://yunnanyingxiang.com/ckfinder/userfiles/files/3741809755.pdfIn PDF document text
    • http://bellezaeimagen.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1613c5eaabc7fd---pokaraxabawuzugejewebib.pdfIn PDF document text
    • http://czernavendeghaz.hu/admin1/file/sekazedopogis.pdfIn PDF document text
    • https://klcconsulting.eu/klc/file/72957539886.pdfIn PDF document text
    • http://nage-z.com/ckfinder/userfiles/files/89002229174.pdfIn PDF document text
    • https://okud-istra.hr/userfiles/file/rilujuzobarawu.pdfIn PDF document text
    • http://neapol-m.ru/usr/file/94437219809.pdfIn PDF document text
    • http://hitmet.slektenkaas.com/bilder/file/datosafimepoketexugifoge.pdfIn PDF document text
    • http://www.synagoge-stommeln.de/ckfinder/userfiles/files/38841160203.pdfIn PDF document text
    • http://crm333.com/documentos/file/89098065603.pdfIn PDF document text
    • http://sanarina.de/ckfinder/userfiles/files/49308406608.pdfIn PDF document text
    • https://clubesolbra.com/uploads/files/64064617487.pdfIn PDF document text
    • http://spartaksedlec.cz/spartaksedlec/userfiles/file/mavifo.pdfIn PDF document text
    • http://magogaralbamoble.com/galeria/files/73759640563.pdfIn PDF document text
    • http://bkht.vn/userfiles/file/muvugotesixotujus.pdfIn PDF document text
    • https://mygoaltv.org/ipp/images/uploads/files/ladazip.pdfIn PDF document text
    • http://eastcity.hu/ufiles/file/83765942457.pdfIn PDF document text
    • http://tao-oita.com/admin/upload_filesfile/28256928840.pdfIn PDF document text
    • http://obasekiestates.com/UserFiles/file/62726333054.pdfIn PDF document text
    • http://simp-q.ru/userfiles/file/fodijivemedixefanefav.pdfIn PDF document text
    • https://noddy.nu/images/file/sinonapezunasinifite.pdfIn PDF document text
    • https://www.truesdalepainting.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130f717e253e---rorukimenetoninigiresiki.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=download+times+of+india+app+for+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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b628.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB628 10744 bytes
SHA-256: 90a4b7c61c2a0165db97374561511175995cc6c052166d389e7480eb2d5434f6
font_01_sfnt_off0000cedb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEDB 16880 bytes
SHA-256: cfd9e97478a63720cb913b09d31404c9b8de7f2d9d596e02c1d92d7fd071e811
font_02_sfnt_off0000f9f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9F9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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