Malicious PDF — malware analysis report

Static analysis result for SHA-256 def3f037c58259ed…

MALICIOUS

PDF

83.6 KB Created: 2021-03-18 13:44:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8d6567dc8b9918080a13d4d07dd94d73 SHA-1: 05493af7b2305bb6620d7d6707377bb0e37836f2 SHA-256: def3f037c58259ed25cb36c8c02834494ccb0d60b5860674db8c8f90f6f66f86
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous external links, identified as a link farm, suggesting a phishing or malware distribution attempt. The ClamAV detection and ML classifier strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a malicious document designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://kuzutuzo.ru/wix?keyword=frigidaire+front+load+washer+user+manual
    • http://zagejudivavi.sportsontheweb.net/orbital_mechanics_and_astrodynamics_hintz.pdf
    • https://lesavudipuvu.weebly.com/uploads/1/3/4/3/134338744/fonap-vuxetumexoj-filinizigo.pdf
    • https://cdn.sqhk.co/letarezetap/Goge6ib/lean_bulk_workout_plan.pdf
    • https://guwemegarorara.weebly.com/uploads/1/3/4/3/134353603/0a39ea08.pdf
    • https://cdn.sqhk.co/tifesijoja/hKjj8Bq/81150197242.pdf
    • https://cdn.sqhk.co/xujanezujol/0VjjgdN/82152872649.pdf
    • https://cdn.sqhk.co/dilujuzaga/Sgcjhpk/gisivapajopusaki.pdf
    • https://xifekuvazunavel.weebly.com/uploads/1/3/4/7/134748582/7825594.pdf
    • https://lupexepiw.weebly.com/uploads/1/3/4/3/134318885/8560814.pdf
    • http://jaxagogilexet.sportsontheweb.net/fetesubexugavodub.pdf
    • https://romiwewigases.weebly.com/uploads/1/3/2/6/132682929/2099442.pdf
    • http://peuer.xyz/4982231249494swh.pdf
    • https://static.s123-cdn-static.com/uploads/4447084/normal_5fe3d7ae3a8d2.pdf
    • http://digitaltoolsfor.xyz/482468721564y0ua.pdf
    • http://kesuvajeb.scienceontheweb.net/xurolosukitin.pdf
    • https://cdn-cms.f-static.net/uploads/4444353/normal_5fd7aefac25a2.pdf
    • https://cdn.sqhk.co/tuledapozato/buuT1hb/bad_piggies_pc_game_download.pdf
    • https://cdn-cms.f-static.net/uploads/4365606/normal_5fd7a411b1860.pdf
    • https://static.s123-cdn-static.com/uploads/4445882/normal_5fffdae8cac41.pdf
    • https://static.s123-cdn-static.com/uploads/4497358/normal_5ff54c275e22b.pdf
    • https://bomosaxume.weebly.com/uploads/1/3/4/8/134892214/lixiwivubolixutudeze.pdf
    • https://lowinuviposawip.weebly.com/uploads/1/3/4/6/134667304/wigagawaturasini.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://wodowepakimeko.onlinewebshop.net/epidemiologia_basica_robert_beaglehole.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000107bd.bin
4a836413cdb903a22c79be98a3808cd4de7f563bf57cac090c6a479fd4a26b39		 pdf-font-stream PDF embedded font (sfnt) at offset 0x107BD 5368 bytes
font_01_sfnt_off000119ee.bin
bc9ff99e51afd099aafd839404b1a4e38b9f51590dd340c572fd0bf8b8f1bb8e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x119EE 11260 bytes

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