Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e617451adfb93f1…

MALICIOUS

PDF

82.0 KB Created: 2021-09-14 07:05:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 1ddd99259f31509e949e046a10ce060b SHA-1: 4592bdb8df886cc81d747178380b51e9196adaca SHA-256: 2e617451adfb93f1a5e5bffd83ca170af94fb8ed0f27d0aea20d84d4508a712d
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, with many pointing to disposable domains and exhibiting link farm characteristics. ClamAV and ML classifiers flagged this PDF as malicious, specifically as a phishing trojan. While no scripts were directly extracted, the PDF structure and URL patterns suggest an intent to redirect users to malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9967

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 http://fgsconsulta.com.br/ckfinder/uploads/userfiles/files/goloxegupa.pdf In PDF document text
    • http://wych123.com/upload/files/sizebenujub.pdfIn PDF document text
    • http://kppzp.pl/userfiles/file/58318096010.pdfIn PDF document text
    • https://everywheregenes.com/uploadfile/qu26_qu106_com/files/73874548672.pdfIn PDF document text
    • http://evaemlak.com/userfiles/file///nezaje.pdfIn PDF document text
    • https://personalloan2u.com/wp-content/plugins/super-forms/uploads/php/files/3c07333d7c6c9013c5f2cb029b7838bb/fokifigadigavadurewadimi.pdfIn PDF document text
    • http://easy-sleep24.de/shop/images/editorfiles/file/83368232793.pdfIn PDF document text
    • http://xn--80aikni6a0b.xn--p1ai/images/file/wokaloresadetafifabeg.pdfIn PDF document text
    • https://alternativecarrepair.nl/userfiles/file/50363235276.pdfIn PDF document text
    • http://podwierzba.eu/ckfinder/userfiles/files/diduwaja.pdfIn PDF document text
    • https://anup.bo/images/files/fuxaxakevunixinesazusaj.pdfIn PDF document text
    • https://www.cdsale.org.au/application/third_party/ckfinder/userfiles/files/31581775067.pdfIn PDF document text
    • http://jamalcar.com/userfiles/file/13560269153.pdfIn PDF document text
    • https://smsenerji.com/resimler/files/sageg.pdfIn PDF document text
    • https://organicfertilizerproduction.com/d/files/noramizoziwidasudawok.pdfIn PDF document text
    • https://jamiatulbanat.in/wp-content/plugins/formcraft/file-upload/server/content/files/1613eb3e51b9f9---tesiwodolisivonavetena.pdfIn PDF document text
    • http://phutungotodungha.com/img/files/81137720424.pdfIn PDF document text
    • https://www.meditech.cz/ckfinder/userfiles/files/11245419567.pdfIn PDF document text
    • https://sammycar.ch/sammy/sites/default/sammyfiles/newsletterfile/matuzunim.pdfIn PDF document text
    • https://flomogroup.com/upload/files/rudepolaxemudupidar.pdfIn PDF document text
    • https://dcoderesearch.com/uploads/5544511317.pdfIn PDF document text
    • http://christopherdallo.com/file/88242736172.pdfIn PDF document text
    • http://d2dgroup.net/upload/files/6277702395.pdfIn PDF document text
    • https://techinnsrl.com/writable/public/userfiles/file/vipexenamukosoxuzov.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=jurassic+park+live+streamPDF 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_off0000dd61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD61 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f573.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF573 17476 bytes
SHA-256: ff9db0e694a2bb716bcbd9ceb828468b991087f135c86c47acdd5d3f3f4d0d3d
font_02_sfnt_off000122c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122C8 10560 bytes
SHA-256: e894fe4449f05d908682be1366f8ab626a6c25917227875ef28ad7610933357d