Malicious PDF — malware analysis report

Static analysis result for SHA-256 8fe9ad49d996a14b…

MALICIOUS

PDF

95.0 KB Created: 2022-06-03 10:53:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2022-07-15
MD5: 4ef893d5aadf51c0cccc4e600d4feb50 SHA-1: c1661c64e27d1a1e38c582c3ac88433700552ace SHA-256: 8fe9ad49d996a14b33c7bb9eb5f8d67c5c0488207dc77e027639271e99279f3f
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links pointing to various domains, suggesting a phishing or malware distribution campaign. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a malicious document designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://yubit.co.za/YmrXLWy8?keyword=acrobat%20pro%20vs%20pdf%20expert%20vs%20adobe%20acrobat%20reader PDF link annotation
    • https://xn--80aab4aif1bzi.xn--07-6kc3bf4angc2g.xn--p1ai/files/files/jifojogeta.pdfIn PDF document text
    • http://555banket.ru/kcfinder/upload/files/fexewuvazi.pdfIn PDF document text
    • http://thanglong.vn-greenenergy.com/ckfinder/userfiles/files/sobojosumif.pdfIn PDF document text
    • https://equator-maritime.com/userfiles/file/6845641921.pdfIn PDF document text
    • https://supesitibozuxo.weebly.com/uploads/1/3/1/4/131454850/wotabizigu-sanazawibawom-medulazigubupo.pdfIn PDF document text
    • http://glbrsciencefair.sfiab.com/data/userfiles/file/vipimapiketamepekunilaxen.pdfIn PDF document text
    • https://www.kpglearningbox.com/assets/kcfinder/upload/files/naluxuzu.pdfIn PDF document text
    • https://tumulole.weebly.com/uploads/1/3/6/0/136054957/617029fb.pdfIn PDF document text
    • https://bolegabafewibe.weebly.com/uploads/1/3/4/6/134651697/donabifenom.pdfIn PDF document text
    • https://libadazoxipa.weebly.com/uploads/1/4/1/4/141426008/6814115.pdfIn PDF document text
    • http://phelieuviethung.vn/upload/files/55285110523.pdfIn PDF document text
    • https://ligefunodimab.weebly.com/uploads/1/3/1/3/131398292/xinafudekajub.pdfIn PDF document text
    • http://adoriantarla.ro/wp-content/plugins/formcraft/file-upload/server/content/files/161fe75956b225---vutido.pdfIn PDF document text
    • http://studiogalata.it/userfiles/files/sagesesuxekulo.pdfIn PDF document text
    • http://chanakol.com/ckfinder/userfiles/files/23173953782.pdfIn PDF document text
    • https://pimowaxe.weebly.com/uploads/1/3/5/3/135397576/luxebed.pdfIn PDF document text
    • https://mepopukivar.weebly.com/uploads/1/3/6/0/136083549/vumeboniku.pdfIn PDF document text
    • https://aimic.com/userfiles/file/93714191005.pdfIn PDF document text
    • https://unstitchedutilities.com/files/file/68705890563.pdfIn PDF document text
    • https://gawirida.weebly.com/uploads/1/3/0/8/130874347/26e241b94b222.pdfIn PDF document text
    • https://bewemulo.weebly.com/uploads/1/4/1/4/141415138/621fa.pdfIn PDF document text
    • http://toitureetfacade.fr/data/Files/vujeleporowatomatebo.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_off0001087d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1087D 20020 bytes
SHA-256: 73c861e8d71f53e381070b9de442f32861d52f52a9c3250b2954d73362138a12
font_01_sfnt_off00013d9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13D9F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000155b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x155B6 10660 bytes
SHA-256: aaffbaebe110386b92f0bc03edb2cb3732c301f7a1263ad068f50446a9113bce