Malicious PDF — malware analysis report

Static analysis result for SHA-256 18eb2e4a31a90812…

MALICIOUS

PDF

70.3 KB Created: 2021-09-11 10:27:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-27
MD5: 07b84158f7c044fe4f59c8826be5f59d SHA-1: 4f28cbbf6b8e5152e592aa205987c3de03ac1959 SHA-256: 18eb2e4a31a908129f15c0e0a9ad94bea7e6c9832b470f7b272095280489f18b
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous external URIs and is identified as a link farm on disposable hosting, suggesting a deceptive purpose. While no scripts were explicitly extracted, the presence of embedded URIs and the nature of the heuristics point towards an attempt to redirect users to potentially harmful content or for SEO manipulation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

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://allegypttours.net/userfiles/files/85999998620.pdf In PDF document text
    • http://freeorden.com/media/file/tubegilixesel.pdfIn PDF document text
    • http://cyclad.org/UserFiles/file/83078693403.pdfIn PDF document text
    • http://alltimescare.com/attachment/files/poxokaviwalixafa.pdfIn PDF document text
    • https://factorysales.com/userfiles/files/ronopawuwifadiwu.pdfIn PDF document text
    • http://zapatosperezcabrera.com/ckfinder/userfiles/files/benavuxefi.pdfIn PDF document text
    • https://tennis-samara.ru/img/file/7031779994.pdfIn PDF document text
    • http://matchedtubes.de/userfiles/file/50540792965.pdfIn PDF document text
    • http://superazs.ru/images/news/file/nosajupixajunuvower.pdfIn PDF document text
    • https://maribon.net/app/webroot/files/userfiles/files/84046056307.pdfIn PDF document text
    • http://remont-etalon.ru/upload/files/55004468584.pdfIn PDF document text
    • http://suamayin.biz/userfiles/file/mawiwebexezokizimin.pdfIn PDF document text
    • http://fmmvn.net/userfiles/files/74900365150.pdfIn PDF document text
    • https://eyetracking.pl/userfiles/file/vomozixefunuwudapi.pdfIn PDF document text
    • http://sunil.kr/uploadfile/fckeditor/file/gegivilagufexositiribex.pdfIn PDF document text
    • https://vidaleve.net/ckfinder/userfiles/files/54976660516.pdfIn PDF document text
    • http://www.cenlafilm.com/siteuploads/editorimg/file/16065637726.pdfIn PDF document text
    • http://lightofislamonair.org/uploads/files/9980871598.pdfIn PDF document text
    • https://thehouseproduction.net/file/timuje.pdfIn PDF document text
    • http://kebirbeton.com/userfiles/file/19207516977.pdfIn PDF document text
    • http://wakesup.org/userfiles/file/rovovanozopimotudako.pdfIn PDF document text
    • http://galluccifaibano.it/userfiles/file/23133092219.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=apk+run+on+windows+10PDF 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_off0000b10c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB10C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c91e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC91E 16840 bytes
SHA-256: bab7c9db1f7756677f0f709a43bff03b997626514109e3852c93e3b60ac9612c
font_02_sfnt_off0000f478.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF478 10380 bytes
SHA-256: d17d07175bf0108a078bb698de0f34251e0586e9bd988b0e50cb8d192519d341

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