Malicious PDF — malware analysis report

Static analysis result for SHA-256 18df93d32fab8478…

MALICIOUS

PDF

82.5 KB Created: 2021-09-13 02:00:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-01
MD5: 8a0e8f60e867e12ef6f7413d83c1d0bb SHA-1: e6d65a42edc6d692666b643cc429187c8b9dfdc1 SHA-256: 18df93d32fab847897c20125adadbb4aa45871f7ad4ac3eca980ba39b5717456
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 0.9974

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://newworldss.com/uploads/file/zutaguzagegatewowizabes.pdf In PDF document text
    • http://compie.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1613838d964f89---83309452853.pdfIn PDF document text
    • http://dynamicyunnan.com/ckfinder/userfiles/files/lexezixok.pdfIn PDF document text
    • http://chretkinia.pl/userfiles/file/9617184567.pdfIn PDF document text
    • http://hangtatmj.com/userfiles/domanijin.pdfIn PDF document text
    • http://goldenagegroup.vip/userfiles/file/28817992365.pdfIn PDF document text
    • http://teleserviciomalaga.com/ckfinder/userfiles/files/watabugifalepogid.pdfIn PDF document text
    • https://dolnoslaskialarmsmogowy.pl/imgturysta/files/5759594568.pdfIn PDF document text
    • https://red-adlay.com/upload/files/pirakedojuzalonabozodosu.pdfIn PDF document text
    • http://dyneco.kr/userData/board/file/94648504040.pdfIn PDF document text
    • https://trade.inter-ural.ru/ckfinder/userfiles/files/titom.pdfIn PDF document text
    • http://redskap.ru/userfiles/file/wonigi.pdfIn PDF document text
    • https://tigaintan.com/contents/files/ladudomu.pdfIn PDF document text
    • http://taociren.com/upload/file/210902031228308877fz7hmucknhvo.pdfIn PDF document text
    • http://technocom.pl/editor/file/17514520857.pdfIn PDF document text
    • http://cosmikkino.ru/sadm_files/23847350030.pdfIn PDF document text
    • https://taichielite.com/louis/taichi/ckfinder/userfiles/files/mudezonakijetu.pdfIn PDF document text
    • http://agataklimowska.pl/userfiles/file/47781808064.pdfIn PDF document text
    • https://transturist.ba/ckeditor/ckfinder/files/files/wikomu.pdfIn PDF document text
    • https://unaizahic.com/Files/files/dijozufate.pdfIn PDF document text
    • http://61kidsclub.com/userfiles/file/wasaguzevofugetakazotasuv.pdfIn PDF document text
    • https://maidintown.co.uk/wp-content/plugins/super-forms/uploads/php/files/b2b68b91b604c7b3620a16f1e744d3af/24946091182.pdfIn PDF document text
    • http://kimdaiphatsteel.com/Images_upload/files/96984436660.pdfIn PDF document text
    • https://e-midas.ro/files/file/jojujisedirukido.pdfIn PDF document text
    • https://suavitinhtannha.net/upload/files/babiniwesivipilotekoj.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=mdm+agent+apkPDF 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_off0000dbd9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBD9 10296 bytes
SHA-256: 0f99c307d86553c7304a8d3269030755f86443e24ce22b97468fad055210e90f
font_01_sfnt_off0000f2ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2CE 18920 bytes
SHA-256: 9074a78c27605a2aab17777299aeed6342b0f8d54366d9aad818e9d1186fb97c
font_02_sfnt_off00012428.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12428 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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