Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2dc50bc88e9840d…

MALICIOUS

PDF

75.9 KB Created: 2021-03-12 06:50:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: f5bd3b1c432dd0ec527e35217af9ce12 SHA-1: dd19f30f7a774e932615f4a3cf8577fee6c8803a SHA-256: c2dc50bc88e9840dc6019c5d894de75b61405966f9ee56189b0d475835c4334d
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. It contains numerous embedded URLs, with at least one, 'https://kuzutuzo.ru/strik?utm_term=what+is+the+role+of+cabin+crew+in+airlines', appearing to be a lure for phishing or malware distribution. The PDF structure also suggests it functions as a link farm on disposable hosting, further supporting a malicious phishing or redirection scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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.
  • 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/strik?utm_term=what+is+the+role+of+cabin+crew+in+airlines PDF link annotation
    • http://wasegulom.mygamesonline.org/xukope.pdfIn PDF document text
    • http://sotipidikukunow.getenjoyment.net/nijuxutum.pdfIn PDF document text
    • http://kujamemapevubu.mypressonline.com/hermle_clock_movements_manual.pdfIn PDF document text
    • http://zaxabumojex.iblogger.org/of_dreams_and_magic_core_rulebook_download.pdfIn PDF document text
    • http://sidanixom.22web.org/febejezogi.pdfIn PDF document text
    • http://mikovil.mywebcommunity.org/29264758876.pdfIn PDF document text
    • http://zegererevez.medianewsonline.com/que_es_la_comunicacin_corporativa_u_organizacional.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://ruzizasasasami.rf.gd/47605708767.pdfIn PDF document text
    • http://jifimurosesapu.atwebpages.com/applied_mergers_and_acquisitions_wiley_finance.pdfIn PDF document text
    • http://lipabarud.atwebpages.com/should_i_buy_a_refurbished_ipad_mini.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/df9cb899-09c7-4858-b312-ed10735804d7/4602431658.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4b971e21-0ee5-4680-8e92-d9ab8fd09164/36862217585.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/917df440-6f10-4b23-b074-605c210342f0/is_5_minute_crafts_legit.pdfIn PDF document text
    • https://2a4065d7-883d-43e8-a524-7ce9aa4b4e88.filesusr.com/ugd/ccb1c6_e7c52a602fd84bf4a6ac7b8405d0fcf2.pdf?index=trueIn PDF document text
    • https://e97408dc-4b05-4e3b-9f19-f4127feb49ef.filesusr.com/ugd/a42eed_a4f9d11da7c1488da3fb494a3962c457.pdf?index=trueIn PDF document text
    • https://95fbbc11-640f-4658-acdf-6e09da746871.filesusr.com/ugd/e42ee3_9e21db67167f46108d1fe113f7d5a6cf.pdf?index=trueIn PDF document text
    • https://2e81f42f-67f9-46a9-89e2-a5f3ab3b03ee.filesusr.com/ugd/f138f5_2edd3baff1ec42e7adce594aecbd4978.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/ad1978fe-2e0a-4d28-a1ac-b25f0ea91ab5/free_dressmaker_2402_sewing_machine_manual.pdfIn PDF document text
    • https://6e37e838-c278-4d46-baa9-25b8497af200.filesusr.com/ugd/fbcb80_36a65c9c4dc9433a85778c086f39823d.pdf?index=trueIn PDF document text
    • http://xazerusovugidu.epizy.com/49051086086.pdfIn PDF document text
    • http://pobunutad.epizy.com/rolukevak.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_off0000ecdd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECDD 5212 bytes
SHA-256: 458d1bb925489f8d0c4bd97a3542adf11514d2bf9f219c5c6b1a469f2a6addef
font_01_sfnt_off0000fead.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEAD 10488 bytes
SHA-256: 0b7fb66f63521dbe139ff3d2f6976af4ee29029aab4d2bb67669fa18ac6e662d

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