Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb024616ad6051f8…

MALICIOUS

PDF

77.9 KB Created: 2021-06-05 22:55:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 51f087da99320d8973525bdd07e1f2f2 SHA-1: cf3dbbddead7791591786c63472dd1a31c1bd8b1 SHA-256: cb024616ad6051f8540d262ed7cead378f663e6ee0777a467ba6a5264eed7778
126 Risk Score

Malware Insights

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

The PDF contains an embedded URL that redirects to a domain associated with malicious activity, as indicated by the 'PDF_URI' and 'ML_NYX_PDF_MALICIOUS' heuristics. ClamAV also detected this file as 'Pdf.Phishing.Trojan'. The document body, though heavily obfuscated, suggests a lure related to a 'Heidi horror movie parents guide', which is likely a pretext to entice users to click the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://resalured.ru/123?utm_term=heidi+horror+movie+parents+guide PDF link annotation
    • https://pakunifa.weebly.com/uploads/1/3/5/3/135307874/kafadudokufitibu.pdfIn PDF document text
    • https://zobovakobazazu.weebly.com/uploads/1/3/4/3/134319401/8238e8524168e90.pdfIn PDF document text
    • https://zudumatiwa.weebly.com/uploads/1/3/0/8/130873708/sodigutasobagid-nipuper-vejedore-vofim.pdfIn PDF document text
    • https://giledaxije.weebly.com/uploads/1/3/4/3/134312043/1284935.pdfIn PDF document text
    • https://dirifanijademad.weebly.com/uploads/1/3/4/8/134898971/walokokefagadug-litubaxitinuza-genopikore-vomixafanesoze.pdfIn PDF document text
    • https://ximuwiwafit.weebly.com/uploads/1/3/4/8/134851464/xubigaxuketo.pdfIn PDF document text
    • https://piturerakilapes.weebly.com/uploads/1/3/0/7/130775197/2958966.pdfIn PDF document text
    • https://jenodefutufute.weebly.com/uploads/1/3/4/3/134373351/b37b2.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/4ee2685d-8174-43b4-8b59-0ab2126b4a27/31658955310.pdfIn PDF document text
    • http://xizisimavi.pbworks.com/f/bozemubofiwusipup.pdfIn PDF document text
    • http://davixezudi.pbworks.com/w/file/fetch/144646020/how_to_unmarry_cobb_accessport_v2.pdfIn PDF document text
    • http://zeladejan.pbworks.com/w/file/fetch/144655962/cuanto_es_3_onzas_de_aceite_en_tazas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a712d4d3-8906-447f-962a-fa42f684c55d/92294467284.pdfIn PDF document text
    • http://pefagisunel.pbworks.com/f/cerere_inmatriculare_auto_2020.pdfIn PDF document text
    • http://tagexoba.pbworks.com/f/what_are_the_benefits_and_harmful_effects_of_bacteria.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/921f61cf-ed03-40cd-89cc-1b7926d9af39/why_catcher_in_the_rye_banned.pdfIn PDF document text
    • http://damopijos.pbworks.com/f/crumple_bleach_tie_dye_hoodie.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1a3de47f-cf2a-4f67-95fb-0c07526c2463/95492821908.pdfIn PDF document text
    • http://munonoraze.pbworks.com/w/file/fetch/144463950/pejekibovodez.pdfIn PDF document text
    • http://poxanoralanu.pbworks.com/w/file/fetch/144426855/gta_san_andreas_cleo_mod_apk_v2.00.pdfIn PDF document text
    • http://wudiwiligis.pbworks.com/f/folorosa.pdfIn PDF document text
    • http://tarogifere.pbworks.com/f/kumafimupupowojogowogemi.pdfIn PDF document text
    • http://bevojoluvu.pbworks.com/f/beginner_easy_chopin_piano_sheet_music.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f35a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF35A 5360 bytes
SHA-256: 0e873937b518ca0fb0fcde88e7165268b4dbcd35c94df79bc88203a6a7fe373c
font_01_sfnt_off0001056d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1056D 10828 bytes
SHA-256: d2f09b2025ffd9fcbc131984b2e6619da21ea3e8ecce02a5fd16c9ae86134546