Malicious PDF — malware analysis report

Static analysis result for SHA-256 aecb06f7dcce2dff…

MALICIOUS

PDF

71.3 KB Created: 2021-09-29 08:18:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: f15f686b3191e00f5c941cdb720097e8 SHA-1: 902312bacbda12f71f4b3276cfc66dd258d3bd52 SHA-256: aecb06f7dcce2dffd2f9bf61cc12c73b0f737362a3a2dfee619d6e42ae4ee0f0
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous external URIs and is identified as a link farm, suggesting its primary purpose is to redirect users to potentially harmful websites. While no scripts were explicitly extracted, the PDF structure and embedded URIs strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://pixomot.ru/uplcv?utm_term=american+pie+2+streaming+service PDF link annotation
    • https://cms.blauraum.com/wp-content/plugins/super-forms/uploads/php/files/1f4e93c9ffdb568a7f70f42e3a9645c2/fuvexeraji.pdfIn PDF document text
    • https://firsatpin.com/calisma2/files/uploads/52875253320.pdfIn PDF document text
    • http://mylodge-naoshima.com/images/blog/file/delejawotesokatub.pdfIn PDF document text
    • http://totoumi.jp/upload/file/ruwujolid.pdfIn PDF document text
    • http://tipiland.net/upload/file/gebopazuxorasidaxadonope.pdfIn PDF document text
    • http://balassalaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/54862298665.pdfIn PDF document text
    • http://preciz.com/uploads/wysiwyg/files/16559601225.pdfIn PDF document text
    • http://kiuruvedenlukio.fi/tiedostot/file/99314427730.pdfIn PDF document text
    • http://chongthamphucthang.com/images/news/files/19706759995.pdfIn PDF document text
    • http://nhatrangpalace.vn/app/webroot/upload/files/63339926440.pdfIn PDF document text
    • http://smm-mm.com/uploads/news_file/ziwexatogolepa.pdfIn PDF document text
    • https://training-access.com/upload/file/63632155303.pdfIn PDF document text
    • http://kxnjl.com/userfiles/files/delebuzupofa.pdfIn PDF document text
    • http://inhome360.ru/admin/ckfinder/userfiles/files/7714653640.pdfIn PDF document text
    • http://apexibd.com/uploads/fck_uploads/file/7352049741.pdfIn PDF document text
    • https://cpsguffanti.it/uploads/file/zatamojelorurazator.pdfIn PDF document text
    • http://odontoflash.eu/userfiles/files/buromirenimaraziravigikax.pdfIn PDF document text
    • https://grupo-kayros.com/userfiles/file/remanetodori.pdfIn PDF document text
    • https://projetounificado.com/uploads/files/perovugikajilarirunobe.pdfIn PDF document text
    • http://evergladesharvesting.com/ckfinder/userfiles/files/lugawovubijefegi.pdfIn PDF document text
    • http://hydrogears.com/survey/userfiles/files/59167893254.pdfIn PDF document text
    • https://facades-et-traditions.com/actualites/file/tuxovavaxijemo.pdfIn PDF document text
    • http://thegioichuyendong.info/app/webroot/upload/files/galokasikimusepuwoge.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_off0000b2df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB2DF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000caf1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCAF1 17304 bytes
SHA-256: 388a4eb2a93e9a37a77c649fbebcbad8528053c1ad84d0d670fce1234a3d730d
font_02_sfnt_off0000f738.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF738 10720 bytes
SHA-256: 1ad0511970615638148efb16be9df47ff465ce1d8c437c61a9f9049d4d666cb3