Malicious PDF — malware analysis report

Static analysis result for SHA-256 e94da9db0422faf3…

MALICIOUS

PDF

73.6 KB Created: 2021-09-13 19:51:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: dff73b2f24f1956a1f76d89f65173d78 SHA-1: 05074a71508e3105a073c971a66d963142955efb SHA-256: e94da9db0422faf36f851ff38d0aa41293ddac341dcbde147ac0d60372490eb2
134 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 embedded JavaScript and numerous external URIs, with many pointing to potentially disposable hosting, suggesting a link farm or phishing lure. The presence of embedded JavaScript indicates an attempt to execute code, likely to redirect the user or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9840

Heuristics 6

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://9262895.ru/ckfinder/userfiles/files/musobavadaned.pdf In PDF document text
    • https://webtechnocrats.com/upload/file/69738099819.pdfIn PDF document text
    • https://fertilizerproductionprocess.com/d/files/60634289421.pdfIn PDF document text
    • http://sunwisechem.com/Uploadfiles/files/65305238528.pdfIn PDF document text
    • http://elhammagazine.com/ckfinder/userfiles/files/58667268444.pdfIn PDF document text
    • https://cauthinh.com/luutru/files/69216529069.pdfIn PDF document text
    • https://medicabg.com/uploads/wysiwyg/files/38858247703.pdfIn PDF document text
    • https://bahispesinde.com/gnc/veri/_files/wikamabijuzenel.pdfIn PDF document text
    • http://sangjeom.com/userfiles/file///40223146036.pdfIn PDF document text
    • http://tylincms.com/userfiles/files/34866514890.pdfIn PDF document text
    • http://azstorestudio.com/uploads/files/tixaw.pdfIn PDF document text
    • http://ikuma-car.com/js/upload/files/88921415699.pdfIn PDF document text
    • https://doctornhospital.com/banglanews24/editorsfiles/files/lozinexapuxuluvep.pdfIn PDF document text
    • http://yushendesign.com/images_fck/file/1631405300.pdfIn PDF document text
    • https://eric-parnes.shortex.com/ckfinder/userfiles/files/lipadatoduto.pdfIn PDF document text
    • http://intproplaw.com/admin/uploads/file/luxawegoratowo.pdfIn PDF document text
    • http://nieruchomosci-swidnica.pl/userfiles/file/28165288335.pdfIn PDF document text
    • https://j26clean.com/upload/files/52978026783.pdfIn PDF document text
    • http://hotechike.com/files/files/62978936992.pdfIn PDF document text
    • http://st-johnson.com/Uploadfiles/files/folaxoketefetijuletawipez.pdfIn PDF document text
    • http://agataklimowska.pl/userfiles/file/petewijejugotiluriw.pdfIn PDF document text
    • http://konberdbio.com/upload/files/widekajubezetosoriputilu.pdfIn PDF document text
    • http://keyday.ru/files/files/32543685993.pdfIn PDF document text
    • http://everbeenmagnet.com/js/upfiles/files/72470609.pdfIn PDF document text
    • http://casadiriposomarsala.it/userfiles/files/lepikomi.pdfIn PDF document text
    • http://b40555.handyfriendship.com/upload/files/razoxafidadiberaxigosu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=shqip+vision+sport+apkPDF 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_off0000b8fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB8FA 18284 bytes
SHA-256: aabf9ac35fa7ed3549a145c9f9a733d5f00d59147d886167355b67a0640a17c8
font_01_sfnt_off0000e8f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8F7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001010e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1010E 10548 bytes
SHA-256: 898489b4f86d052f8e497491ee7c2a48d3ffc803497c678982b063fd69906969