Malicious PDF — malware analysis report

Static analysis result for SHA-256 57d01237e7d41779…

MALICIOUS

PDF

80.9 KB Created: 2021-09-13 20:17:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: e3d793c491d7367c7496d2d9f8ac8d62 SHA-1: 0789a456dc4dc7c096b8bf94f4302ecc4fa17eea SHA-256: 57d01237e7d41779236c8c31c5446147cc43120d50468a2126de105d297195fb
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, many of which are hosted on disposable domains or are part of link farms, suggesting a phishing or credential harvesting operation. The PDF's structure and the presence of external URIs point towards an attempt to redirect the user to malicious websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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://irlanc.ru/uplcv?utm_term=galaxy+wearable+app+alternative PDF link annotation
    • https://petribax.nl/userfiles/file/fekurema.pdfIn PDF document text
    • https://www.newhorizonscrisiscenter.org/ckfinder/userfiles/files/nikepivabupa.pdfIn PDF document text
    • http://theaterbuehne-schwandorf.de/userfiles/file/tisavu.pdfIn PDF document text
    • https://khachsan295doson.vn/namthuan/images/news/files/42529649519.pdfIn PDF document text
    • http://quiltingacademy.com/fckeditor/userfiles/file/gigunikelota.pdfIn PDF document text
    • http://sanruou.com/app/webroot/uploads/files/19604283335.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613b09743bf5b---gazenovumew.pdfIn PDF document text
    • http://hoanggiaphatland.com/uploads/image/files/wunijezogirejejo.pdfIn PDF document text
    • https://chptravel.ir/data/file/73976916787.pdfIn PDF document text
    • http://www.bridalchapel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613e21fdbd05b---fujegepefu.pdfIn PDF document text
    • http://brava-ekb.ru/userfiles/file/vizegekifaxezotozezewag.pdfIn PDF document text
    • https://postelezmasivu-ostrava.cz/ckfinder/userfiles/files/54268292032.pdfIn PDF document text
    • https://ratosatu.com/contents/files/61548760268.pdfIn PDF document text
    • http://ewtch.com/upload/files/bewamefiwulom.pdfIn PDF document text
    • http://fandimnarodaku.cz/upload/file/purosawigorivexep.pdfIn PDF document text
    • http://russkiivopros.com/images/FCKeditor/file/vogaratifag.pdfIn PDF document text
    • http://queensparkview.com/image/upload/File/85544452911.pdfIn PDF document text
    • https://xo-sound.ru/userfiles/file/71990001535.pdfIn PDF document text
    • http://2222.netsociality.com/upload/files/46996718901.pdfIn PDF document text
    • http://xn--12cmi2byac9cdhd0hra6d7bxkwbgj1gch.com/user_img/files/75776003704.pdfIn PDF document text
    • http://gddfboiler.com/uploads/files/bokulesobidawe.pdfIn PDF document text
    • http://fongyoskert.hu/userfiles/files/julavibonemedemosibu.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

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_off0000d8bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8BD 17496 bytes
SHA-256: c029145bc9f857e6cd86ce96ead8355b900bd76f526c02d7558b91e0842a9f37
font_01_sfnt_off000105fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105FB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011e12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E12 10504 bytes
SHA-256: e14f63b7c90bf5c0aea26440f1d42a21cf34bd41337b9ef97e3b62b2c06c36b2

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