Malicious PDF — malware analysis report

Static analysis result for SHA-256 b5a77021f13cbf9f…

MALICIOUS

PDF

94.8 KB Created: 2021-09-17 22:52:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: d595075176c037849b38695416580b2a SHA-1: 0afb6f6c55f4e58972d26fa59715a76b89b65136 SHA-256: b5a77021f13cbf9f97bfe64c7821e0731128d45d1cff9618238c59cffbf43c9d
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains an embedded JavaScript stream and numerous external URIs, indicating malicious intent. The ML classifier and ClamAV detection strongly suggest this is a phishing or malware distribution document. The embedded JavaScript likely facilitates the redirection to malicious sites or the download of further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

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 https://drafthe.ru/uplcv?utm_term=competitor+keyword+analysis+free PDF link annotation
    • http://gk-eventus.ru/admin/ckfinder/userfiles/files/ruzit.pdfIn PDF document text
    • http://dalieuht.com/app/webroot/uploads/files/sizowe.pdfIn PDF document text
    • https://madeinstlucia.com/userfiles/files/zameravar.pdfIn PDF document text
    • https://glycocalyx.nl/userfiles/image/file/zulirapivivajesanukuji.pdfIn PDF document text
    • http://xn--82cac8d3ajrc0gd0bo4a7nf3qg.com/userfiles/files/xadosolidok.pdfIn PDF document text
    • https://bohemiamaestro.com/webpagebuilder/ckfinder/userfiles/files/sufenuxileduxo.pdfIn PDF document text
    • https://trisyscom.com/userfiles/file/62097575363.pdfIn PDF document text
    • http://stin-verdon.fr/assets/Image/files/jezisotipu.pdfIn PDF document text
    • http://albarossa.jp/js/upload/files/79510756436.pdfIn PDF document text
    • http://eiak.org/upload/editor/files/mokopupotojovezipikig.pdfIn PDF document text
    • http://ozdesignhouse.com/app/webroot/uploads/files/zeferibasimejufapi.pdfIn PDF document text
    • https://vibangnhadat.com/uploads/files/56112704357.pdfIn PDF document text
    • https://bhavanarayanaswamy.org/userfiles/file/78146883651.pdfIn PDF document text
    • http://orlickachata.cz/files/files/36815498339.pdfIn PDF document text
    • http://77owship.netsociality.com/upload/files/7899553343.pdfIn PDF document text
    • https://esteticarcare.com/wp-content/plugins/super-forms/uploads/php/files/ffe3fce7a5c29427859e6f259ee22389/pazarijakoduzolugutogizo.pdfIn PDF document text
    • http://zanethompson.com/userfiles/file/kutivenadagepumutukodix.pdfIn PDF document text
    • http://amunt.madteam.net/ckfinder/userfiles/files/76365175658.pdfIn PDF document text
    • http://sakaryakasaplarodasi.org/userfiles/file/rixanimoveruri.pdfIn PDF document text
    • http://vmkmsz.hu/userfiles/file/52382132024.pdfIn PDF document text
    • http://xn--9n2bn9mz3aba29g44r4o0a.kr/fckeditor/userfiles/image/fimimimifapezaratenovez.pdfIn PDF document text
    • http://xatrbio.com/userfiles/file/bifitirilidew.pdfIn PDF document text
    • http://barbusci.it/maisUserFile/file/vixukofavumasuroxajazi.pdfIn PDF document text
    • http://dmychadla.eu/UserFiles/File/ruzudujewaru.pdfIn PDF document text
    • 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_off00010952.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10952 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00012169.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12169 10980 bytes
SHA-256: 9fcfb34eca98e84b7bbdb0a05d1013cd33eb6e145f613c00d0a93ee7b2a76493
font_02_sfnt_off00013af2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13AF2 19340 bytes
SHA-256: 6c622a97c029df6c8c9a267d3ce69717860d42d41173a9d67e86291515a270ef

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