Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a1918dcd346d8ee…

MALICIOUS

PDF

67.6 KB Created: 2021-09-30 13:09:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 0f06fa90d81e3528507c1d6ff86178c1 SHA-1: 1455159b5032406366e7e757cdc15f538245b44b SHA-256: 7a1918dcd346d8ee7184055c7ac5401618a68b3bd87c8cf8bb8c12bfdb175c32
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file was flagged by ML classifiers and ClamAV as malicious, exhibiting characteristics of a phishing or trojan distribution. The presence of a link farm on disposable hosting, coupled with numerous embedded URLs, suggests an attempt to redirect users to malicious sites. Although no scripts were directly extracted, the PDF structure and heuristic firings indicate it's designed to exploit vulnerabilities or trick users into downloading further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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.saveurspoitoucharentes.com/admin/ckfinder/userfiles/files/76798906819.pdf In PDF document text
    • https://chorland-dining.com/webroot/editor-uploads/files/83472693507.pdfIn PDF document text
    • http://omeofest.eu/userfiles/files/fizogalaruvigavobawoji.pdfIn PDF document text
    • http://goldmustang.com/files/files/95973763334.pdfIn PDF document text
    • https://doctornhospital.com/banglanews24/editorsfiles/files/xibetobuzejudesoda.pdfIn PDF document text
    • https://ppuhperspektywa.pl/files/edytor/file/puxomuzobatamijusur.pdfIn PDF document text
    • http://aotwresort.net/ckfinder/userfiles/files/pimemalemaxerunifabu.pdfIn PDF document text
    • https://vashadvokat82.ru/wp-content/plugins/super-forms/uploads/php/files/54923228b018affc67334822d01b4387/tolevalir.pdfIn PDF document text
    • http://alituncer.com/userfiles/file/xolatasevofiziv.pdfIn PDF document text
    • http://rosesrealtyhomes.com/userfiles/files/putelurodusetefidi.pdfIn PDF document text
    • https://gulceoyunlar.com/calisma2/files/uploads/nowidupel.pdfIn PDF document text
    • http://unitez.net/images/newtech/files/zuzevipara.pdfIn PDF document text
    • http://aptekadc.pl/userfiles/userfile/zuforariwo.pdfIn PDF document text
    • http://asbazainville.org/userfiles/file/8532809181.pdfIn PDF document text
    • https://webmenuplus.com/images/file/ditoxaboz.pdfIn PDF document text
    • http://kramnyca.info/img/upload/editor/file/38505519023.pdfIn PDF document text
    • http://allamericannursing.com/userfiles/file/56149505286.pdfIn PDF document text
    • https://bunian-co.com/other_files/File/xeziranurijudeloka.pdfIn PDF document text
    • http://bdpq.hungminhits.com/files/uploaded/files/99013007743.pdfIn PDF document text
    • http://uptownfallschurch.com/uploads/files/tajedigokanovowupowese.pdfIn PDF document text
    • http://crisismobile.com/ckfinder/userfiles/files/sikilalogivuwop.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=download+ppsspp+psp+psx+ps2PDF 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_off0000ab2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAB2A 10272 bytes
SHA-256: b3f9939da4e71d0f78a8dc08efdac962a0f3017ca2f1772b4f1f574d72e98173
font_01_sfnt_off0000c27d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC27D 15416 bytes
SHA-256: c2ad49b7d889016aa9a988e57c8d5c969cb25c000f3330d1ad586fb46438c7a9
font_02_sfnt_off0000e968.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE968 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.