Malicious PDF — malware analysis report

Static analysis result for SHA-256 dabc387665f52e43…

MALICIOUS

PDF

81.7 KB Created: 2021-09-11 19:57:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 302386d4aaf135806f0d5088aac6c170 SHA-1: d3db63f4391af38fff03944e9a33d10667c39a05 SHA-256: dabc387665f52e433fb7ffb56a9ff80606d6915ffa50c72b144b3cbbaaf50939
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a large number of external URIs, many of which are hosted on disposable domains, indicating a link farm or phishing attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to redirect users to malicious sites or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 6

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://energosol.pl/images_cms/file/11880520576.pdf In PDF document text
    • http://bcslaw.hu/admin/fck_upload/file/gisupiboginuridobo.pdfIn PDF document text
    • http://mediasingrid.com/js/new/fckeditor/userfiles/file/40053926299.pdfIn PDF document text
    • https://www.wroclawmodelshow.pl/ckfinder/userfiles/files/zaginox.pdfIn PDF document text
    • http://www.vako.vn/app/webroot/uploads/files/69098528761.pdfIn PDF document text
    • http://ccshecea.org/upload/files/nifoxikisozezojopisu.pdfIn PDF document text
    • https://olgunbey.com/upload/ckfinder/files/difabukukegefez.pdfIn PDF document text
    • http://rdmsrl.it/userfiles/files/voloxerim.pdfIn PDF document text
    • http://dragonspond.com/uploads/files/nefaxazirulunaletas.pdfIn PDF document text
    • http://elandtour.com/FileData/ckfinder/files/20210902_A2D91E020D833E54.pdfIn PDF document text
    • http://viaterrestre.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16134b7d315587---18414318132.pdfIn PDF document text
    • http://phunphu.com/userfiles/file/viduxogewudadikodemekos.pdfIn PDF document text
    • http://uptownchantilly.com/uploads/files/90157699429.pdfIn PDF document text
    • http://gazosilikatnn.ru/uploads/files/95400439389.pdfIn PDF document text
    • http://www.jindatunnel.com/up_files/file/bozezawetefode.pdfIn PDF document text
    • http://elazentrale.de/images/uploaded/file/tureresuwon.pdfIn PDF document text
    • https://doanhnghiepvietnam.org/img_duhoc/files/97511042540.pdfIn PDF document text
    • https://xn----7sbeo1acdy3adh.xn--p1ai/userfiles/file/23183643644.pdfIn PDF document text
    • http://hongdacable.com/d/files/7573394853.pdfIn PDF document text
    • https://hopclickhospitality.com/scgtest/team-explore/uploads/files/woruxepori.pdfIn PDF document text
    • http://namlinhchivietnam.net/userfiles/image/file/21125206951.pdfIn PDF document text
    • https://damiel.eu/userfiles/file/55211055581.pdfIn PDF document text
    • https://plasy.com/uploads/file/tefubirenakeb.pdfIn PDF document text
    • http://111-orte.de/testarea/cwsCMSlight/media/files/jopapenupej.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=throne+of+atlantis+full+moviePDF 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_off0000dad9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAD9 10608 bytes
SHA-256: 4ef7492cd75453df715910b3cb0550cb021d80a91e65de481b4a369c6c1ce710
font_01_sfnt_off0000f2eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2EB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010afd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AFD 17656 bytes
SHA-256: 9d059fb4e43789baf4bb45c4fd33ef082187482f0a07acdf8d2315c5f6d65948