Malicious PDF — malware analysis report

Static analysis result for SHA-256 e8d734956d8815cd…

MALICIOUS

PDF

69.3 KB Created: 2021-09-30 19:58:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: fc2f1e0a211faaf3699a21da73e430c8 SHA-1: 2935e80ca15e6786487f92e3ffa3c7c6834c3a08 SHA-256: e8d734956d8815cd4ebb26cc63e0f5d7f5b9d8c3edd50556eca690cf27ced536
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs pointing to external sites, suggesting a phishing or malware distribution scheme. The PDF structure and embedded content are consistent with attempts to disguise malicious links or redirect users to compromised or malicious domains.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://coolingrealestate.com/your-home-cleaner/FCKuploads/file/zabuzez.pdf In PDF document text
    • http://tabletopad.com/images/file/jisifesaderobagikitulewa.pdfIn PDF document text
    • http://idcla.net/upload/files/82791540203.pdfIn PDF document text
    • http://www.css-jp.com/upfile/files/2021/09/10/8857693386.pdfIn PDF document text
    • http://faradtvandor.hu/picture/userfiles/file/39401089216.pdfIn PDF document text
    • http://lsmtrontractor.com/upfiles/file/20210925191430.pdfIn PDF document text
    • http://sozopolihills.com/userfiles/file/45952059699.pdfIn PDF document text
    • http://logicparcel.net/uploadsEditorfile/90478012024.pdfIn PDF document text
    • http://xn----9sbkvfu2aex3d.xn--p1ai/ckfinder/userfiles/files/pediviwedi.pdfIn PDF document text
    • http://foto-preiss.at/upload_files/files/pafelurufoxoferozavikak.pdfIn PDF document text
    • http://ibrahimalsada.com/pics/file/43838412343.pdfIn PDF document text
    • http://kapelski.pl/userfiles/file/lukodukopukusesuwuf.pdfIn PDF document text
    • http://uniontsg96.ru/admin/ckfinder/userfiles/files/febamofokutegakexowilu.pdfIn PDF document text
    • http://fuku-zou.com/userfiles/file/detumumatoniderowibov.pdfIn PDF document text
    • https://dienlanhhonganh.com/images/pic/file/womavumigiguzevix.pdfIn PDF document text
    • http://www.espaciocultivarte.com/ckfinder/userfiles/files/sadidisemeguzeli.pdfIn PDF document text
    • http://anninh247.info/upload/files/navitob.pdfIn PDF document text
    • http://sunmoon-glory.com/web/upload/files/51080657830.pdfIn PDF document text
    • https://muahohangnhat.com/app/webroot/uploads/files/gemugonojufobo.pdfIn PDF document text
    • https://vonia.mikludava.lt/images/files/3144104178.pdfIn PDF document text
    • http://sweet-sugar.de/images/uploadedimages/file/43662103212.pdfIn PDF document text
    • http://top-caster.com/userfiles/file/putedurizekomaxidujilu.pdfIn PDF document text
    • http://change4best.ru/upload/file/78496273741.pdfIn PDF document text
    • http://e-park.es/img/uploads/files/23951117276.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=city+island+3+unlimited+money+and+goldPDF link annotation
    • 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_off0000af25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAF25 15416 bytes
SHA-256: 9c7ec662fc544c9228e6457f26fa8f053204c4e09f5c6c1d1bde469a1bad897b
font_01_sfnt_off0000d675.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD675 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000ee8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE8C 10908 bytes
SHA-256: e21460af8bdeb314a22a29526ec9f363c5a84ded650ddd3fc432db57cf912a83