Malicious PDF — malware analysis report

Static analysis result for SHA-256 d32c3bd2e5f0920d…

MALICIOUS

PDF

79.5 KB Created: 2021-09-20 18:57:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: 87910b81e95b7ecc8587eada0b0eb100 SHA-1: 3063c8f95bf86a05bc6dd54f46619f18cc1c90e7 SHA-256: d32c3bd2e5f0920da9df39a60ad2cc457920fc5bfddfdbf7bd624f3918284007
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple external links, with one specifically identified as a link farm on disposable hosting, directing users to download another PDF. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The presence of external URIs suggests an attempt to redirect the user to a malicious site or download a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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://queure.ru/uplcv?utm_term=super+mario+iso+ppsspp PDF link annotation
    • http://veterinarioassociatopacinidallatorre.eu/userfiles/files/66200644982.pdfIn PDF document text
    • http://litroshaber.net/resimler/files/70982914960.pdfIn PDF document text
    • http://centronegozi.com/public/zozobutepunamevupovut.pdfIn PDF document text
    • https://fong-cai.com/upload/files/likutubitubalusir.pdfIn PDF document text
    • http://aokisuper.com/ckfinder/userfiles/files/nojusiduginidewaperex.pdfIn PDF document text
    • http://katachizu.com/img/news/files/nutof.pdfIn PDF document text
    • http://chupanhnoithat.vn/upload/files/95730042954.pdfIn PDF document text
    • http://sostrevalli.it/userfiles/files/dudujabarawo.pdfIn PDF document text
    • http://radiosalsa.fr/php/rs/filesupload/file/dovifasofazi.pdfIn PDF document text
    • https://ahreco.com/uploads/news_file/renerukokegoweped.pdfIn PDF document text
    • http://falerisztika.hu/tmp/81927116927.pdfIn PDF document text
    • http://www.verneteco.com/ckfinder/userfiles/files/39728870856.pdfIn PDF document text
    • http://elrey-uslugi.ru/media/file/45413868676.pdfIn PDF document text
    • http://softwaretesting.kr/club/data/userfiles/file/20210901161104.pdfIn PDF document text
    • http://xn--b1agjlwjc3g.xn--p1ai/ckfinder/userfiles/files/tolijipeferigivog.pdfIn PDF document text
    • https://polresseluma.com/assets/ckfinder/core/connector/php/uploads/files/55568514492.pdfIn PDF document text
    • http://akgwealthplanner.com/crm/files/29918682212.pdfIn PDF document text
    • http://bkht.vn/userfiles/file/labowujuxinazimiwugadunu.pdfIn PDF document text
    • http://jncs.kr/page_data/file/20210917092921.pdfIn PDF document text
    • http://retrolondontees.com/userfiles/file/94272375552.pdfIn PDF document text
    • https://www.cir.cloud/wp-content/plugins/formcraft/file-upload/server/content/files/16138bec1b635d---wedafisipuzepi.pdfIn PDF document text
    • https://beldapromosyon.com/calisma2/files/uploads/42270791315.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_off0000d012.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD012 18792 bytes
SHA-256: 027494a5c90b2c4743d6799e07d2393584804f3bc52db89a942779746ed18f70
font_01_sfnt_off0001017e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1017E 10340 bytes
SHA-256: 5f134e352b57eec0e750f09dd5971b9a11bcb4f3139a6f131410f8613c12c806
font_02_sfnt_off000118cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118CD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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